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London-Auckland in zero emissions hydrogen-powered jet? UK-backed concept design unveiled

London-Auckland in zero emissions hydrogen-powered jet? UK-backed concept design unveiled

A UK-backed research group unveiled a design for a liquid hydrogen-powered airliner theoretically capable of matching the performance of current midsize aircraft without producing carbon emissions.

The FlyZero concept envisions a plane carrying 279 passengers non-stop from London to San Francisco, or from London to Auckland with one stop, at the same speed and comfort as today, the Aerospace Technology Institute said in a statement. The group, a partnership between the UK government and industry, is meant to accelerate high-risk projects that will benefit home-grown firms.

Hydrogen propulsion is seen as one of the most promising technologies for achieving carbon-neutral commercial flights. However, it’s expensive and more challenging to store on board, and it will take years to develop the planes and build infrastructure such as airport refuelling capacity.

The UK, which hosted the COP26 climate summit last month, is funding new technologies to help create aerospace jobs while meeting its climate targets. The government has committed US$2.6 billion (NZ$3.8 billion) of funding to ATI since its start in 2013 through 2026, an amount to be matched by industry. The FlyZero concept received £15 million (NZ$30 million) in government funding.

 

“These designs could define the future of aerospace and aviation,” said Business Secretary Kwasi Kwarteng in the statement. “By working with industry, we are showing that truly carbon free flight could be possible, with hydrogen a frontrunner to replace conventional fossil fuels.”

 

ATI said it expects hydrogen aircraft to be operating from the mid-2030s offering better economics than conventional planes. By early next year, the FlyZero project will publish detailed concepts for regional, narrow-body and midsize aircraft, with technology roadmaps, market and economic reports and a sustainability assessment, the group said.

 

Hydrogen propulsion is seen as one of the most promising technologies for achieving carbon-neutral commercial flights. AEROSPACE TECHNOLOGY INSTITUTE/SUPPLIED

 

The midsize aircraft being showcased on Monday (Tuesday NZT) would store hydrogen at minus 418 degrees Fahrenheit (minus 250 degrees Celsius) in cryogenic fuel tanks at the rear of the plane and in two smaller “cheek” tanks along the forward fuselage to keep the aircraft balanced.

It would have a wingspan of 177 feet (54m), between Boeing’s 767 and 787 twin-aisle jets, and be powered by two turbofan engines.

While Boeing hasn’t set plans for a hydrogen plane, Airbus has targeted a commercial airliner for entry into service by 2035. The European company has told the European Union that a model carrying more than 150 passengers won’t be in wide use until 2050.

 

ATI said it expects hydrogen aircraft to be operating from the mid-2030s offering better economics than conventional planes. AEROSPACE TECHNOLOGY INSTITUTE/SUPPLIED

 

In the meantime, the aviation industry has put its focus on so-called sustainable fuel, which can be blended into the kerosene that powers current aircraft, and battery powered flight, which is limited to smaller craft like air taxis because of the weight of cells.

The aviation industry is under pressure to slash emissions rapidly or face limits to growth, even as breakthrough technology remains years away. Airlines and manufacturers are also contending with ongoing disruption to business caused by Covid-19, which has weakened their financial outlook already.

 


 

Source Stuff

Four cheap ways to save energy at home

Four cheap ways to save energy at home
Making your home more energy efficient can be costly and may not be possible if you’re renting, or you don’t have thousands of pounds stashed away to buy new heat pumps and double glazing.

But there are some cheap solutions to try to save money. We’ve looked at where you are likely to be losing the most energy in your home and come up with some simple solutions to help save money on your bills and keep warm this winter.

 

1. Doors

Warm air wants to leave your home and will find any nook and cranny to do so. As it does, cold air is sucked in to replace it, causing draughts. It makes your home cold and wastes energy.

Shutting doors and closing windows may not be enough as any gaps in the frames allow warm air to escape – and that costs money. On this thermal image, the draughts show up as the coldest areas around a front door.

The coolest temperatures are black, purple and blue and the draughts are shown around the door in these colours, says James Richardson, of IRT Surveys – which uses thermal imaging to help home owners identify where heat is being lost.

The letter box, often an escape route for hot air, appears warm (red and yellow colours) so it is likely to be well-sealed and insulated.

But by simply adding a draught excluder – or even a rolled up towel – the draughts can be blocked, as we can see in these before and after images:

 

 

Energy firms and energy-saving campaigners agree one of the simplest solutions to keeping out the cold is to use a draught excluder. Combined with draught-proofing of windows and doors, it could help cut around £25 a year off your bills.

Having a rolled-up towel by the front door may not be the most attractive household feature, but you can always try to make and decorate one yourself.

 

 

It is important to make sure the draught excluder covers the width of the door. And for a no-sew method, use strips of the discarded material to make ties and tie up each end of the trouser leg instead.

If you don’t fancy cutting up your jeans you could just use a rectangular piece of material to make a tube and fill in a similar fashion. You’ll end up with a more regular-shaped excluder.

For the really crafty, or Team GB Olympic gold medal-winning divers perhaps, Home Energy Scotland have a pattern for a knitted version.

 

2. Windows

Badly fitting windows or single panes of glass are another place heat is often lost.

If you can’t get windows replaced with double glazing, the Energy Saving Trust says it is worth getting some heavy curtains to help keep the heat in the room.

Again, the thermal images show how closing the curtains traps that heat in with you.

 

 

You may not want to sit in the dark all day, so look out for cheap DIY kits available that use a thin plastic sheet to cover the window, blocking draughts.

They are sometimes shrink-fitted into place with a hairdryer and can be removed and replaced as required.

 

3. Loft hatch

Insulating your loft is like wearing a woolly hat – trapping the warmth below to keep you cosy. However, that hatch is just like any other door and needs attention too.

Even James was surprised by the thermal image showing heat being lost around the frame. But it’s an easy fix, making sure it is snugly insulated around the edges.

One suggestion online is to glue a plastic bag to the back of the hatch, fill it some of the loft insulation and then seal it up. It should help insulate the hatch and flop over the edges when you pull it shut, stopping draughts escaping.

 

 

4: Behaviour

There are lots of little things we can do around the home that will help save energy and money that just require tweaks to our behaviour rather than installing, fitting or making anything.

Most energy companies will install a smart meter for free so you can help monitor your energy use and spending.

But there are other small changes to your daily routine that cost nothing and save energy. The obvious ones are spending less time in the shower (potentially saving about £10 a year), turning off the lights (£14) or turning down the thermostat (saving up to£55).

The Eco-Experts blog recommends “heating the humans, not the building” – so perhaps don’t keep the central heating on all the time if you’re not cold, and don’t heat rooms you’re not in.

Other ideas include:

  • Put lids on pots and pans when cooking – it’ll be done quicker
  • Use a microwave to reheat food rather than the oven
  • Don’t overfill the kettle. Filling a kettle for two cups of tea rather than boiling a full kettle could save you around £45 a year
  • Defrost your fridge – it will work more efficiently
  • Buy a smaller telly – Age UK says in general smaller TVs cost less to run and plasma screens use more electricity

And finally there is the old favourite – repeated by parents down the ages and still on the advice the elderly by Age UK – if you’re cold, put on an extra layer – several thin layers of clothing will keep you warmer than one thick layer, as the layers trap warm air between them.

 


 

Source BBC

An Indigenous community in India’s Meghalaya state offers lessons in climate resilience

An Indigenous community in India’s Meghalaya state offers lessons in climate resilience
  • The Indigenous food system of the Khasi community in Nongtraw village in Meghalaya offers lessons in climate resilience and sustainable food systems, says a United Nations Food and Agricultural Organisation report.
  • The traditional food production system is supported by jhum (shifting cultivation), home gardens, forest and water bodies and shies away from the use of synthetic chemicals. It is based on community-led landscape management practices, regulated by local governance.
  • Factors such as the emergence of cash crop production (broom grass), the impact of India’s public distribution system on the local subsistence system and over-reliance on market-based products are weakening the food system’s resilience.
  • Research priorities on Indigenous food systems should include systematic documentation of a wide variety of Indigenous foods known to the Indigenous communities, their contribution to food security and dietary diversity.

In the village of Nongtraw in India’s northeastern state of Meghalaya, one of the world’s wettest regions, honey is a sought after resource by the Khasi Indigenous community. They go into the forests to collect it. Once they reach a beehive, they introduce themselves to the bees, “informing the bees” that they will only take what is required. This legacy of respect for local agrobiodiversity by not disrupting the ecological balance has stood the Khasi community of Nongtraw in good stead when it comes to climate change-linked food stress, underscores a United Nations report.

The UN’s Food and Agricultural Organisation (FAO) report on Indigenous People’s Food Systems co-published by FAO and the Alliance of Bioversity International, and CIAT includes the profiles of eight Indigenous Peoples food systems from around the world, including Uttarakhand and Meghalaya in India.

In Nongtraw, a village solely inhabited by the Khasi, diverse traditional food systems supported by jhum (shifting cultivation), home gardens, forest and water bodies, shying away from synthetic chemicals in food production and community-led landscape management underpin this Indigenous food system’s resilience to climate change and sustainability.

Nongtraw lies along the mid-slope of a deep gorge in the Cherrapunji region, a highly dissected plateau along the southern margins of the Meghalaya Plateau. Satellite images of the Cherrapunji watershed, which receives record rainfall, reveal rocky outcrops on what appears to be a barren tableland with thin soil cover. But pan more, and there is a sudden green plunge: secondary forests of shifting cultivation hugging the steep slopes of the canyons and winding gorges. Jhum is the primary food production system in the community, involving two distinct land uses — agriculture and fallow forestry — that alternate in sequence and time on the same plot of land.

“I thought the canyons were very green because it is challenging for the people to do anything out there, so they remained untouched. But when I did my research (on shifting cultivation), I found that the practice of shifting cultivation is still strong in these watersheds,” notes Bhogtoram Mawroh, one of the authors of the report and a member of the Khasi community.

The Khasis repose confidence in the resilience of their food system sustained by the robust self-governance of their community. However, factors such as the shift to cash crops (broom grass and oil palm), the impact of India’s public distribution system on the local subsistence system, and over-reliance on market-based products dent their resilience.

“When the dependence on the local landscape becomes limited, and food items are now sourced from outside the community supported by government policies, agrobiodiversity goes down, and the ecological knowledge system which gives resilience to the food system is also lost. Then monoculture of cash crops becomes more dominant, which further brings down resilience,” says Mawroh, senior associate, at the Meghalaya-based North East Slow Food and Agrobiodiversity Society (NESFAS).

Based on factors such as socio-economic, demographic status and health, the sensitivity of agricultural production, forest-dependent livelihoods and access to information services and infrastructure, a recent government study of 12 states in the Indian Himalayan Region and their vulnerability to climate change, found that other Indian states — Assam and Mizoram, followed by Jammu and Kashmir, Manipur, Meghalaya and West Bengal, Nagaland, Himachal Pradesh and Tripura, Arunachal Pradesh and Uttarakhand — had high vulnerabilities.

Community nutrition researcher Suparna Ghosh-Jerath who studies links between agro-biodiversity, hidden hunger, and rural Indigenous communities such as the Sauria Paharias, a particularly vulnerable tribal group (PVTG) of Jharkhand, adds that what was learned in historical times — what grows where — that knowledge may be helpful and lead to climate-friendly agricultural practices.

“What we have to examine now is how climate-resilient they are,” said Ghosh-Jerath, a professor at the Indian Institute of Public Health, New Delhi. She is not associated with the FAO report.

 

Research priorities on Indigenous food systems should include systematic documentation of a wide variety of Indigenous foods known to the Indigenous communities (their taxonomic classification, seasonal availability, their nutritive value, their current use within the communities), their contribution to food security and dietary diversity.

“Studies should explore what dictates food habits, what are the factors that facilitate or are barriers to consumption of Indigenous foods, what should be the behavior change communication strategies to ensure the community places faith in their food systems and values it. We should, however, be cognizant that this traditional knowledge is co-produced with the Indigenous communities so that they get due recognition, acknowledgment and ownership over their traditional knowledge,” Ghosh-Jerath told Mongabay-India.

More than 7,500 km away at Glasgow, Indigenous practices were under the spotlight at the COP 26 this November, the United Nations climate summit, where indigenous leaders worldwide highlighted a bouquet of climate mitigation and adaptation practices informed by indigenous and local knowledge. According to the IPCC’s latest Global Assessment, these practices “can accelerate wide-scale behavior changes consistent with adapting to and limiting global warming to 1.5°C.”

 

How Nongtraw’s local landscape sustains the community

Nongtraw sits in an important center of crop origin and diversity, and the domestication of local plants is ongoing. The report emphasizes that wild fruits of yesterday are the domesticated fruits of today, referring to edibles such as the Mandarin orange. Some crops grown in the community were introduced centuries ago and are considered traditional because of their long histories in the region, such as millet, rice bean, maize, cassava, sweet potato, and potato.

As many as 63 species of plants, including cereals, legumes, roots and tubers, vegetables, fruits, nuts and seeds and other edible species, are grown in the jhum fields or the kitchen gardens. Many of the crops grown by the community have multiple varieties.

For example, jhum agriculture yields a bounty of 12 potato varieties, seven cocoyam varieties and seven sweet potato varieties. “We get our medicines from the food we grow. During COVID-19 lockdown, which saw market chain disruptions, we were able to access quality food because we traditionally rely on our local agrobiodiversity for food production,” Didiana Ranee from Nongtraw told Mongabay-India.

The community uses no external inputs, especially synthetic chemicals, for food production, notes Mawroh quoting the report. “Under the jhum system, the only input used is the ash which comes from burning the biomass which has been felled when clearing the land for cultivation.”

 

The local governance oversees the food production system, ensuring that the landscape is healthy and strengthening the food system’s resilience. The Durbar Shnong (village council) is the most critical institution in the community governing natural resources making rules and regulations for protecting and preserving the forest and other natural areas within the local landscape.

“For instance, soil and aspect of the land determine farming. The higher reaches are not disturbed since they hold the source of water for the community,” Mawroh adds. Aiding the work of the village council is the village development committee (VDC). Its most important function is to obtain land for cultivation. The rules and regulations it sets for harvesting natural products from the community land are intended to prevent a future shortage of land for growing food.

 

Including knowledge on local agrobiodiversity in policies

Until the mid-90s, the community in Nongtraw relied on locally produced grains, vegetables and tuber crops, including staples sweet potato, millet and cocoyams for consumption supplemented by plants and animals from the forest. “Millet is our rice,” points out Pascal Ranee of Nongtraw.

However, with the introduction of the Public Distribution System in the 1980s coupled with increasing incomes and market access, rice became ubiquitous in the diet and is now the most important food of the community, substituting millet and other grain crops like Job’s tears.

“Food from the market has indeed become more important for the community’s diet as is the case in many parts of the world. Now, almost half of the diet comes from the market. It has benefits, especially during the lean season when crops are yet to be harvested, and there is a high dependence on forest food. The community has accepted the convenience of the market. The important point to remember, though, is that there are local substitutes available for the market-sourced food, but this is something which is not well recognized,” said Mawroh.

Parallelly, the cultivation of cash crops such as broom, allowed farmers to improve their economic status, the sign of which is the replacement of the thatched roof with that of tin. But farming broom led to the depletion of water resources and degradation of soil. The report also mentions that since 2016, the government has intervened in the Khasi community of Nongtraw, restricting jhum and requiring a written document from the government for land transactions within the community.

Much like the Khasis in Nongtraw, the Sauria Paharias of Jharkhand, a particularly vulnerable tribal group (PVTG), who practice Kurwa farming (a form of shifting agriculture in forests, along with farming in agricultural lands) have switched to growing rice in place of drought-resistant millets due to agricultural interventions which mainly focused on yields.

“Under the traditional system, they accessed natural food sources such as forests and waterbodies. Through their Indigenous knowledge that was acquired from experiential learning from ancestors, they understood these foods are edible and had certain properties and promoted them within their culture. They knew what to grow and where to grow them in accordance with the local climate,” Suparna Ghosh-Jerath explained.

 

The tribal group copes with climate variabilities, such as long dry spells and erratic rains, by using climate-resilient Indigenous crop varieties for farming, seed conservation and access to Indigenous forest foods and weeds for consumption during adverse situations and lean periods. The community recognizes that the local climate variability has affected farm productivity and diversity (due to a water-stressed environment).

These changes have also influenced the availability of Indigenous foods from natural vegetation, forests, and water bodies in the region. Flavorsome indigenous rice varieties (such as Bismunia and Dumarkani), which were consumed by the older generations, have now become almost non-existent or extinct. Millets like (Gundli or little millet), which were widespread earlier, have presently become virtually extinct, notes Ghosh-Jerath in a research that is supported by DBT/Wellcome Trust India Alliance Fellowship.

In Meghalaya, Mawroh and colleagues strive to include local agrobiodiversity in policies, particularly Neglected and Underutilised Species (NUS) in jhum cultivation that do not receive the deserved attention. “Inclusion of the agrobiodiversity in local government programs like Mid-Day Meal Scheme (a school meal program) can be another way to encourage the continued practice of the local food system,” he said. For example, NESFAS encourages the establishment of school gardens from which vegetables are harvested and included in the meal for children.

Another way is to support the establishment and functioning of community seed banks. An affordable certification system could help the community realize the value of its ecologically sustainable food production system, which is organic. Further, the National Education Policy 2020 has tremendous scope to mainstream traditional knowledge systems in formal education, Mawroh adds.

He says it is vital to steer the debate away from jhum destroying forests to jhum providing valuable ecosystem services due to its landscape management approach. “Gradually, as the body of research grows, we will be able to unravel more aspects of such traditional systems.”

 

This article was first published here on the Mongabay-India website on Nov. 4, 2021. 

 


 

Source Mongabay

Liquid marbles: how this tiny, emerging technology could solve carbon capture and storage problems

Liquid marbles: how this tiny, emerging technology could solve carbon capture and storage problems

Carbon capture and storage (CCS) has been touted, again and again, as one of the critical technologies that could help Australia reach its climate targets, and features heavily in the federal government’s plan for net-zero emissions by 2050.

CCS is generally when emissions are captured at the source, such as from a coal-fired power station, trucked to a remote location and stored underground.

But critics say investing in CCS means betting on technology that’s not yet proven to work at scale. Indeed, technology-wise, the design of effective carbon-capturing materials, both solid and liquid, has historically been a challenging task.

So could it ever be a viable solution to the fossil fuel industry’s carbon dioxide emissions?

Emerging overseas research shows “liquid marbles”—tiny droplets coated with nanoparticles—could possibly address current challenges in materials used to capture carbon. And our modelling research, published yesterday, brings us a big step closer to making this futuristic technology a reality.

 

Issues with carbon capture

Under its Technology Investment Roadmap, the Morrison government considers CCS a priority low-emissions technology, and is investing A$300 million over ten years to develop it.

But the efficacy and efficiency of CCS has long been controversial due to its high-operational costs and scaling-up issues for a wider application.

An ongoing problem, more specifically, is the effectiveness of materials used to capture the CO₂, such as absorbents. One example is called “amine scrubbing“, a method used since 1930 to separate, for instance, CO₂ from  and hydrogen.

The problems with amine scrubbing include its high costs, corrosion-related issues and high losses in materials and energy. Liquid marbles can overcome some of these challenges.

This technology can be almost invisible to the naked eye, with some marbles under 1 millimetre in diameter. The liquid it holds—most commonly water or alcohol—is on the scale of microlitres (a microlitre is one thousandth of a millilitre).

The marbles have an outer layer of nanoparticles that form a flexible and porous shell, preventing the liquid within from leaking out. Thanks to this armour, they can behave like flexible, stretchable and soft solids, with a liquid core.

 

What do marbles have to do with CCS?

Liquid marbles have many unique abilities: they can float, they roll smoothly, and they can be stacked on top of each other.

Other desirable properties include resistance to contamination, low-friction and flexible manipulation, making them appealing for applications such as gas capture, drug delivery and even as miniature bio-reactors.

In the context of CO₂ capture, their ability to selectively interact with gases, liquids and solids is most crucial. A key advantage of using liquid marbles is their size and shape, because thousands of spherical particles only millimetres in size can directly be installed in large reactors.

Gas from the reactor hits the marbles, where it clings to the nanoparticle outer shell (in a process called “adsorption”). The gas then reacts with the liquid within, separating the CO₂ and capturing it inside the marble. Later, we can take out this CO₂ and store it underground, and then recycle the liquid for future processing.

This process can be a more time and cost-efficient way of capturing CO₂ due to, for example, the liquid (and potentially solid) recycling, as well as the marbles’ high mechanical strength, reactivity, sorption rates and long-term stability.

 

So what’s stopping us?

Despite recent progress, many properties of liquid marbles remain elusive. What’s more, the only way to test liquid marbles is currently through physical experiments conducted in a laboratory.

Physical experiments have their limitations, such as the difficulty to measure the  and surface area, which are important indicators of the marble’s reactivity and stability.

In this context, our new computational modelling can improve our understanding of these properties, and can help overcome the use of costly and time-intensive experiment-only procedures.

Another challenge is developing practical, rigorous and large-scale approaches to manipulate liquid marble arrays within the reactor. Further computational modelling we’re currently working on will aim to analyse the three-dimensional changes in the shapes and dynamics of liquid marbles, with better convenience and accuracy.

This will open up new horizons for a myriad of engineering applications, including CO₂ capture.

 

Beyond carbon capture

Research on liquid marbles started off as just an inquisitive topic around 20 years ago and, since then, ongoing research has made it a sought-after platform with applications beyond .

This cutting-edge technology could not only change how we solve climate problems, but environmental and medical problems, too.

Magnetic liquid marbles, for example, have demonstrated their potential in biomedical procedures, such as , due to their ability to be opened and closed using magnets outside the body. Other applications of liquid marbles include gas sensing, acidity sensing and pollution detection.

With more modelling and experiments, the next logical step would be to scale up this  for mainstream use.

 


 

Source Phys.org

Electric vehicle and ‘compact’ city combo could reach emissions targets

Electric vehicle and ‘compact’ city combo could reach emissions targets

Getting more people into electric vehicles needs to happen alongside a shift to more “compact” cities where fewer car journeys are needed if governments want to stave off the most dire effects of global warming, researchers said on Thursday.

Curbing urban transport emissions is a narrow but critical piece in the broader fight against climate change, as cities from Paris to Jakarta re-orient their streets to promote public transit use and bicycle and walking paths.

“If politicians think electrification is going to save the day… and everybody’s going to go out and buy an electric vehicle, it’s just not going to work,” said Heather Thompson, CEO of the Institute for Transportation and Development Policy.

The research looked at four scenarios for transport: “business as usual,” massive electrification of public and private vehicles by 2050, a major shift in cities to non-car transport, and a “high EV + shift” combination.

The “EV + shift” scenario was the only one whose estimated 2020-2050 emissions were in line with targets of the 2015 Paris Agreement on climate change, which aims to limit global temperature rise to “well under” 2 degrees Celsius.

The key is minimizing the overall number of vehicles on the road and electrifying the rest, said Thompson, whose nonprofit group developed and released the research in concert with the University of California, Davis.

 

Rising emissions

Urban passenger transport represents about 10 per cent of the world’s climate-changing emissions — but those emissions have been increasing steadily as private vehicles become easier to acquire in emerging economies, the study found.

Researchers acknowledged that putting into place a large-scale “EV + shift” combination would require a “vast global effort,” likening it to the construction of the US interstate highway system in the 1950s.

But the study catalogued examples of cities promoting effective land use and public transporation options that others could emulate.

Mexico City, for instance, features both a viable public bikeshare system and policies that disincentivize or reduce parking availability.

In the US Pacific Northwest, Portland has pushed zoning laws encouraging high-density development — which makes walking to services easier — and Seattle has worked to ensure residents have close access to high-frequency bus routes.

The study pointed out that Paris decreased car travel by almost 50 per cent in 30 years by promoting other options, while Jakarta in 2004 opened a mass transit system that drew nearly a million daily riders pre-pandemic.

“We have the solutions. We have the technology. We know which ones are more cost-effective. It’s really about political will,” Thompson told the Thomson Reuters Foundation.

More immediate, tangible steps to promote clean transport – like creating protected bike lanes and sidewalks and boosting rapid transit – would serve people where they already live, she noted.

“These are things that cities can do. It’s not about people moving — it’s about bringing those better transportation options to people wherever they live,” she said.

 

Roadblocks

Still, even gradual changes to city design and zoning laws can generate massive political blowback — as with hastily installed road barriers designed to make space for walking and cycling in London during an early pandemic lockdown.

A combination of inertia and entrenchment of old designs and thinking are major obstacles, said Brendan Shane, climate director at The Trust for Public Land, a nonprofit group.

“The idea that the road is the principal design feature for a new area… (and that) the car comes first and the people come second still tends to be dominant,” he said.

In the United States and elsewhere, competing interests of developers, residents, and local businesses can make it nearly impossible to satisfy everyone.

Jennifer Roberts, the former mayor of Charlotte, North Carolina, recalled a recent conversation with small business owners in a “densifying” neighborhood.

“It was so interesting because half the business owners were like ‘We don’t have enough parking’ and ‘Our customers can’t get there,’” she said.

“And the other (half) were like, ‘We need less parking — our customers walk and bike to where we are. We want more space for our restaurant — less space for the cars.’”

By 2050, a shift to more compact cities could cut direct public and private costs of urban passenger transport by $5 trillion per year compared to the “business as usual” and high-electrification-only options, the ITDP report found.

Ballot initiatives in the United States suggest people are capable of embracing such fundamental changes if they see tangible benefits, said Linda Hwang, director of strategy and innovation at The Trust for Public Land.

“We see time and time again people making the choice to tax (themselves) if it means they’re going to get more parks, more trails, more public lands,” she said.

“Nobody likes the word tax and nobody likes a carbon tax, but if you call it a park then they (say), ‘Yeah, I’ll pay for that.’”

This story was published with permission from Thomson Reuters Foundation, the charitable arm of Thomson Reuters, that covers humanitarian news, climate change, resilience, women’s rights, trafficking and property rights. Visit http://news.trust.org/climate.

 


 

Source Eco Business

California tackles food waste with largest recycling program in US

California tackles food waste with largest recycling program in US

California will soon enact the largest mandatory residential food waste recycling program in the US in January, an effort designed to dramatically cut down on organic waste in landfills and reduce the state’s methane emissions.

When food scraps such as banana peels and leftover veggies and other organic materials break down they emit methane, a greenhouse gas more potent and damaging in the short-term than carbon emissions from fossil fuels. Organic material such as food and yard waste makes up a fifth of the state’s methane emissions and half of everything in California landfills, according to CalRecycle.

California plans to start converting food waste into compost or energy in order to avoid these emissions, becoming the second state to do so after Vermont launched a similar program last year.

“This is the biggest change to trash since recycling started in the 1980s,” said Rachel Wagoner, the director of the California Department of Resources Recycling and Recovery.

Most California residents will be required to toss excess food into green waste bins rather than the trash. Municipalities will then turn the food waste into compost or use it to create biogas, an energy source that is similar to natural gas.

 

A truck unloads organic waste to be used for composting at a facility in Woodland, California. Photograph: Rich Pedroncelli/AP

 

Recycling food waste “is the single easiest and fastest thing that every single person can do to affect climate change”, Wagoner said.

The effort reflects growing recognition about the role food waste plays in damaging the environment. Up to 40% of food in the US is wasted, according to the US Department of Agriculture.

A handful of states and countries, including France, have passed laws requiring grocery stores and other large businesses to recycle or donate excess food to charities, but California’s program targets households and businesses. In 2016, California passed a law aimed at reducing methane emissions by significantly cutting down on discarded food.

Starting in January, all cities and counties that provide trash services are supposed to have food recycling programs in place and grocery stores must donate edible food that otherwise would be thrown away to food banks or similar organizations.

“There’s just no reason to stick this material in a landfill, it just happens to be cheap and easy to do so,” said Ned Spang, faculty lead for the Food Loss and Waste Collaborative at the University of California, Davis.

Vermont, home to 625,000 people compared with California’s nearly 40 million, is the only other state that bans residents from throwing their food waste in the trash. Under a law that took effect in July 2020, residents can compost the waste in their yards, opt for curbside pick up or drop it at waste stations. Seattle and San Francisco have similar programs.

 

Students discard their uneaten lunch into a food waste can at an elementary school in Connecticut. Photograph: Dave Zajac/AP

 

Under California’s new law, the state must cut organic waste in landfills by 75% from 2014 levels by 2025, or from about 23m tons to 5.7m tons.

Most local governments will allow homeowners and apartment dwellers to dump excess food into yard waste bins, with some providing countertop containers to hold the scraps for a few days before taking it outside. Some areas can get exemptions for parts of the law, such as rural locations where bears rummage through trash cans.

The food waste will go to facilities for composting or for turning it into energy through anaerobic digestion, a process that creates biogas that can be used like natural gas for heating and electricity.

But only a fifth of California’s composting facilities may accept food waste, and they face a strict permitting process to take food waste alongside traditional green waste such as leaves.

The state also set a 2025 goal of diverting 20% of food that would otherwise go to landfills to feed people in need. Supermarkets must start donating their excess food in January and hotels, restaurants, hospitals, schools and large event venues will start doing so in 2024. The donation part of the law will contribute toward a federal goal of cutting food waste in half by 2030.

Davis, California, already has a mandatory food recycling program. Joy Klineberg puts coffee grounds, fruit rinds and cooking scraps into a metal bin labeled “compost” on her countertop. When preparing dinners, she empties excess food from the cutting board into the bin.

Every few days, she dumps the contents into her green waste bin outside, which is picked up and sent to a county facility. Unpleasant countertop bin smells haven’t been a problem, she said.

 

Joy Klineberg lives in Davis, California, where residents are already required to recycle their food waste. Photograph: Rich Pedroncelli/AP

 

“All you’re changing is where you’re throwing things, it’s just another bin,” she said. “It’s really easy, and it’s amazing how much less trash you have.”

Implementing similar programs in bigger cities is more challenging.

Los Angeles and San Diego, the state’s two most populous cities, which together account for about one of every eight Californians, are among those that won’t have their programs ready for all households next month.

That’s because it takes time to buy the necessary equipment, such as green waste bins for households that don’t already have them for yard waste and to set up facilities to take the material. Trash collection fees will go up in many places.

CalRecycle also wants to focus more on education and less on punishment. Governments can avoid penalties by self-reporting to the state by March if they don’t have programs in place and outlining plans for starting them. Cities that refuse to comply could eventually be fined up to $10,000 a day.

Ken Prue, the deputy director of San Diego’s environmental services department, said the city put nearly $9m in this year’s budget to buy more waste bins, countertop containers and trucks to haul the additional waste.

Prue hopes San Diego residents will quickly realize the importance of recycling food waste after the program starts next summer.

“Hopefully before they know it, it becomes second nature,” he said.

 


 

Source The Guardian

Energy firms want APAC governments to step up in the energy transition

Energy firms want APAC governments to step up in the energy transition

Energy firms are pressing on governments in Asia-Pacific to facilitate the development of renewable power and technologies on the back of the COP26 global climate summit where countries pledged to slash greenhouse gas emissions.

In a series of forums organised by media firm Thomson Reuters last week, industry leaders said that political will is key to ensuring a smooth switch to green fuels.

Nitin Apte, chief executive of Singapore-based solar and wind power firm Vena Energy, said governments need to provide transparent and predictable pathways for companies to align with their sustainability targets in the next few decades.

“Projects that we develop take several years,” said Nitin. “They’re around for 20, 30 years in the communities that they are going to be built in.”

Nitin added that he wants to see countries collaborate and help firms on cross-border energy projects, pointing to examples like Singapore’s slated import of up to 100 megawatts of hydroelectric power from Laos. The venture involves Keppel Electric, a Singapore-based power retailer, and the Laotian state electricity company.

Other speakers said demand for hydrogen power from “centres of consumption” like Japan, China and Taiwan, could be fulfilled by Australian exports. Australia is set to become one of the world’s largest producers of green hydrogen.

 

Each country has a different history, a different energy mix. Does that mean each country will just look at its roadmap in isolation? I guess not, maybe that’s precisely where collaboration comes into play.

Valery Tubbax, chief financial officer, InterContinental Energy

 

“Each country has a different history, a different energy mix. Does that mean each country will just look at its roadmap in isolation? I guess not, maybe that’s precisely where collaboration comes into play,” said Valery Tubbax, chief financial officer of Hong Kong-based hydrogen power firm InterContinental Energy.

Chairperson of Taiwan’s Offshore Wind Industry Association Marina Hsu agreed, saying that associations can invest and advocate for development, but it’s the job of country leaders to “liaise and really think strategically” across the region.

Singapore Minister of State for Trade and Industry Low Yen Ling, speaking at the forum, said countries in Asia-Pacific need to play to their strengths, and “given different countries’ circumstances, the energy transition strategy for countries in APAC will really differ from one another”.

Low said Singapore is focusing on developing emerging technologies, and it recently awarded US$40 million to 12 projects on low-carbon hydrogen, as well as carbon capture, utilisation and storage.

“I hope we will only see an acceleration of the pace of deployment of carbon-neutral technologies,” said Thomas Baudlot, CEO of the Southeast Asia arm of French utility firm ENGIE.

But how much cash other governments in Asia-Pacific can pour into decarbonisation remains in question. In Southeast Asia, the Covid-19 pandemic caused delays in renewable energy projects and put a strain on the public purse to fund capital projects. Many member states’ climate pledges are also contingent on foreign funding.

 

Countries in ASEAN may need to place a greater emphasis on balancing social economics with sustainability.

Mohamad Irwan Aman, head of sustainability, Sarawak Energy

 

“Countries in ASEAN may need to place a greater emphasis on balancing social economics with sustainability,” said Mohamad Irwan Aman, head of sustainability at Malaysian utility firm Sarawak Energy.

Others point to the government’s role in managing private players to prevent a chaotic scramble for power generation and distribution markets. Australia’s electricity market hit a crisis point in 2017, when high wind and solar investments caused the closure of fossil fuel plants, while the grid was not prepared for intermittent power supply. After a series of black-outs and close shaves, the government worked on coordinating supply between power plants and invested in batteries – steps that led to a smoother roll-out of renewables in the years since.

“The foundation for net-zero in the energy infrastructure space, where everyone can be a winner, starts with a thought through and orchestrated plan,” said Morris Zhou, co-founder and executive chairman at Australian solar power firm Maoneng. “I believe that this responsibility sits with the policymakers around the world.”

Citing the need to adapt to climate change, Irwan said companies shouldn’t wait for policy changes before building a business case around addressing climate change. “This is not about environmental issues, it’s about the company’s survival in the long term,” he added.

 

Balancing green power and efficiency

Despite the rapid escalation in renewables, discussions also focused on increasing energy efficiency for existing power infrastructure, particularly in India, which will remain reliant on coal-fired power for some time. Currently the world’s third-biggest emitter of greenhouse gases after China and the United States, India has pledged to reach net zero carbon emissions by 2070. While there will be an overall reduction of coal’s contribution to electricity in the coming years with the ramping-up of renewables, India’s coal consumption is expected to grow in absolute terms.

India’s electricity consumption per person increased by over 30 per cent since 2012, although it’s just 40 per cent of the world average in absolute terms. But as the middle class in the world’s second largest country expands, its energy demand in the next 20 years is expected to outstrip all other countries.

This means not just adding incremental power capacity with renewables, according to Raman Kalra, chief digital officer of Indian solar and wind energy firm ReNew Power, but making the efficiency of existing power assets “much, much higher”.

Kalra said that involves using digital technologies to make the electricity grid work optimally, and to create better public transport networks to take cars off the road. India’s car ownership is expected to increase five-fold by 2040, which will drive demand for oil.

Wasting power is not just India’s problem. A United Nations report found energy efficiency to be the most useful tool in curbing energy demand in Asia Pacific, followed by developing renewable energy. Mismanaged road traffic is the main culprit for energy inefficiencies, alongside manufacturing and a lack of building regulations for houses which end up wasting energy in heating and cooling.

The International Energy Agency also factors in a “major worldwide push to increase energy efficiency” in its projected net-zero scenario, where the 2030 world economy is 40 per cent larger but uses 7 per cent less energy.

 

No carbon is produced from energy that’s not used. It’s not been sexy to have that discussion, but it’s a missing piece.

Jeff Connolly, Chairman and CEO, Siemens Australia and New Zealand

 

“No carbon is produced from energy that’s not used. It’s not been sexy to have that discussion, but it’s a missing piece,” said Jeff Connolly, chairman and CEO of Siemens Australia and New Zealand. The firm provides energy management and tracking services.

While smart meters for energy optimisation, along with renewables like solar and wind, are ready for mass deployment, speakers conceded that other popular technologies like green hydrogen and carbon capture are nascent and expensive. But they’re bullish about the prospects.

“Technology has always surprised us on the upside,” said Vipul Tuli, South Asia CEO of Singapore energy firm Sembcorp.

 


 

Source Eco Business

Germany’s Scholz seals deal to end Merkel era

Germany’s Scholz seals deal to end Merkel era

Olaf Scholz will head a three-party coalition with broad plans for Germany’s transition to a green economy, under a deal to end 16 years of government led by Angela Merkel.

Almost two months after his Social Democrat party won federal elections, he will go into power with the Greens and business-friendly Free Democrats.

Climate protection forms a big part of the coalition deal.

The parties aim to phase out coal use by 2030, eight years ahead of schedule.

They will also seek to use 2% of German territory for wind power and focus on hydrogen-based energy too. By 2030, the parties want 80% of electricity to be sourced from renewable energy and 15 million electric cars to be on German roads.

There are also plans to legalise the sale of cannabis in licensed premises, with controls on the quality and distribution of the drug.

Germany is Europe’s biggest economy, so decisions taken by the new government will have a big effect on its neighbours.

In a news conference, Mr Scholz, 63, said “sovereignty of Europe is a cornerstone of our foreign policy”. He highlighted Germany’s friendship with France and partnership with the US.

He spoke of daring to make greater progress in a coalition “on equal terms”. He also pointed out that the three parties’ wider memberships still had to approve what has been labelled a “traffic-light” coalition, because of the parties’ red, yellow and green colours.

 

Olaf Scholz has served as vice chancellor since 2018 but is set to take over from Angela Merkel in the second week of December

 

He will only take over as chancellor from Mrs Merkel after a vote in the Bundestag, expected between 6 and 9 December.

Mr Scholz will enter office during a difficult period of the Covid-19 pandemic, with Germany one of several European countries where infections have skyrocketed to record levels in recent weeks.

On Wednesday, he said the coalition would ramp up vaccinations and consider making jabs compulsory for health staff and other essential worker.

“The situation is bleak,” Mr Scholz said. “The coronavirus is still not vanquished.”

 

‘Biggest challenge of our time’

The Social Democrats won the 26 September vote, ahead of Mrs Merkel’s Christian Democrat alliance, which saw its worst-ever election result. The Greens achieved their best-ever result, under candidate Annalena Baerbock, who spoke of an ambitious alliance aiming to start a paradigm shift to transform the economy.

Describing the climate crisis as the biggest challenge of our time she said: “We can transform our economy so it becomes climate neutral. We have an agreement where climate neutrality is a common denominator.”

Ms Baerbock is expected to become foreign minister in the new government, while her Greens co-leader Robert Habeck gets the role of vice-chancellor as well as overseeing energy transition.

The new finance minister is set to be Christian Lindner, the Free Democrat leader whose party has a wide following of young voters. “The younger generation has given us this job to overcome the status quo of recent years,” he said.

 

What are their plans?

Making Germany climate neutral by 2045 is a big focus of the deal, entitled “Daring more progress”. Phasing out coal will take place “ideally” by 2030, and solar energy will become compulsory on the roofs of new commercial buildings and the general rule for new private homes. The 16 states will have to provide 2% of their area for wind power. The goal to phase out cars with internal combustion engines remains the EU’s target of 2035.

Minimum wages will rise to €12 (£10) an hour and another 400,000 new apartments will be built every year, a quarter of which will be social housing, to tackle Germany’s housing crisis.

The voting age will be lowered from 18 to 16, with plans to reform electoral law to bring an end to ever-increasing numbers of MPs. The new Bundestag has 735 seats. Changing the voting age for European elections requires a simple parliamentary majority, but for federal elections it would need two-thirds support.

Immigrants will be able to apply for German citizenship after five years. They will also be allowed dual citizenship under the coalition’s plans. This would transform the lives of millions of immigrants, many of who remain foreign nationals despite having lived in Germany for decades.

A Covid crisis team will be set up at the chancellery to focus on the pandemic. Mr Scholz said vaccination was the way out of the pandemic and in some care settings involving vulnerable people it should be made compulsory. Mr Scholz said the coalition had agreed to invest €1bn in bonuses for health workers.

On foreign policy, the parties said they wanted “to raise Europe’s strategic sovereignty”, which effectively means more independence on energy, security and other international issues. However, Germany’s relationship with the US and its membership of the Nato alliance will remain central to its security.

Germany’s no-new-debt rule was lifted during the pandemic as more funds were needed to address the crisis. But by 2023, the coalition says it wants to bring back the debt brake which is enshrined in Germany’s constitution.

A ban on doctors advertising that they carry out abortions will be lifted, to enable public information to be provided about the method without fear of prosecution.

 


 

Source BBC

This ‘liquid tree’ in Belgrade is fighting back against air pollution

This ‘liquid tree’ in Belgrade is fighting back against air pollution

Belgrade has an innovative tool in the fight against dirty air – this so-called “liquid tree”.

It’s Serbia’s first urban photo-bioreactor, a solution for tackling greenhouse gas emissions and improving air quality.

It contains six hundred litres of water and uses microalgae to bind carbon dioxide and produce pure oxygen through photosynthesis.

“The microalgae replaces two, 10-year-old trees or 200 square metres of lawn,” said Dr Ivan Spasojevic, one of the authors of the project from the Institute for Multidisciplinary Research at the University of Belgrade.

“The system is the same because both trees and grass perform photosynthesis and bind carbon dioxide.

“The advantage of microalgae is that they are 10 to 50 times more efficient than trees.

“Our goal is not to replace forests but to use this system to fill those urban pockets where there is no space for planting trees.”

 

 

Belgrade is the fourth most polluted city in Serbia, due to the two large coal power plants nearby.

The two plants are among the top 10 dirtiest plants in Europe, according to the European NGO Health and Environment Alliance (HEAL).

In 2019, Serbia ranked as Europe’s fifth most polluted country with an average PM 2.5 in air pollution, according to the IQAir’s World Air Quality Report.

Another report in December 2019 also put the country under increased scrutiny, as scientists claimed Serbia had Europe’s worst per capita record for pollution-related deaths: 175 per 100,000 people.

Activists have also claimed that pollution in Serbia and in other parts of the Balkan peninsula is so bad that it can be seen, smelt and even tasted, especially during autumn and winter.

 


 

Source Euronews.green

Turning fungi into ‘bricks’ for construction

Turning fungi into ‘bricks’ for construction

A house or building made of mushrooms may sound far-fetched and fragile, but do not underestimate the strength of the mycelium, a hardy component of the fungi.

Researchers in Singapore and Switzerland are now studying the use of mycelium as a sustainable building construction material.

Mycelium is the vast underground root network of fungi.

The mushroom one sees is merely the fruiting body, making up just a small part of the fungus. This means the bulk of a fungus grows underground.

In a 2019 documentary titled Fantastic Fungi, it was reported that there are 480km of mycelium under every footstep one takes in the forest.

When cultured in the lab, a mass of mycelium looks like white fluff.

Although delicate-looking, this “fluff” is being turned into “mushroom bricks” for construction as part of a research project.

The branching threads are made of substances such as chitin and cellulose that are known to be strong, said Assistant Professor Hortense Le Ferrand, a co-investigator in the project under the Future Cities Lab (FCL) Global programme.

The programme was launched late last year at the Singapore-ETH Centre – a collaborative research centre between Singapore institutions and Swiss university ETH Zurich.

The research on using mycelium for building construction is one of eight projects in the programme focusing on enhancing the sustainability of cities and human settlements.

 

Buildings and construction generate about 40 per cent of planet-warming carbon dioxide, according to the 2019 Global Status Report for Buildings and Construction. A quarter of the emissions came from manufacturing building materials and products such as glass, cement and steel.

Between 2016 and 2019, construction and demolition generated the largest amount of waste in Singapore – between 1.4 million and 1.6 million tonnes a year – although 99 per cent of the waste is recycled here. This is where mycelium comes in handy.

Mycelium cannot turn into an eco-friendly building block on its own. It needs plant-based waste or food waste such as sawdust, bamboo or coffee grounds as a medium.

When a fungus is grown on a bed of sawdust or corn stalks, the mycelium branches out and snakes through the fragments of waste, binding to them. It takes three to four weeks for the mycelium network to grow and bond with every fragment of waste. The mass is then cast into a mould to be shaped into a mushroom brick. Once the material has lived through its lifespan, it can be composted instead of filling up landfills.

 

Fungi is grown on a bed of sawdust and cornstalks, with the mycelium binding to the waste. After three to four weeks, the mycelium-based mass is cast into a mould to form the mushroom brick. PHOTO: COURTESY OF THE LIVING

 

The mushroom brick has been around for a few years, mainly showcased in installations. Now, the researchers want to optimise the use of mycelium for building construction.

Mycelium’s growth depends on factors including the species of fungi, type of plant-based waste, temperature and humidity, said Prof Le Ferrand at a virtual presentation hosted by FCL Global earlier this month.

Different species of fungi produce mycelium with different qualities.

“Studying the amount of chitin and cellulose that fungi produce is one way to find out which species and growth conditions yield the strongest mycelium,” said Prof Le Ferrand, who is a faculty member at Nanyang Technological University’s School of Materials Science and Engineering.

Over the next five years, Prof Le Ferrand and her team will conduct studies to optimise the growth of mycelium and explore how 3D printing can be used to build a mycelium-based structure.

 

The MycoTree – a branching structure made out of load-bearing mycelium components – that was exhibited at the Seoul Biennale of Architecture from September 2017 to March 2018. PHOTO: CARLINA TETERIS

 

The project’s team in ETH Zurich is improving on the mushroom brick’s function and exploring suitable architectural applications.

Dr Juney Lee, a senior researcher at the Swiss institute and another co-investigator of the project, said at the presentation: “These alternative and sustainable materials tend to be much weaker than concrete or steel, so they require an intelligent geometry and structural shape.”

 

Mushroom Bricks

Scientists from Singapore and Switzerland have recently embarked on a five-year research project to find out how a hardy component in fungi, known as mycelium, can be used in construction. Here are some details on the process.

 

What is mycelium?

 

The fluffy white material growing inside this petri-dish of agar is called mycelium. PHOTO: EUGENE SOH, NTU

 

Mycelium is the underground root network of a mushroom, with threads that are measured in kilometres.

Under an electron microscope, mycelium threads branch out to form an intricate, interconnected web. A mass of mycelium has more networks than the number of neural pathways in a brain.

 

Why is mycelium a promising construction material?

Mycelium is rich in substances such as cellulose and chitin which are known to be mechanically strong.

It is also re-resistant, lightweight, and absorbs sound.

When a fungus or mushroom grows on plant-based waste such as sawdust or corn stalks, the fast-growing mycelium threads will bind the loose waste materials together into a mass – forming the building blocks of a “mushroom brick”.

 

How is mycelium sustainable?

 

Mycelium growing on a bed of sawdust (left) and after a week’s worth of growth. PHOTOS: EUGENE SOH, NTU

 

Mycelium is organic and biodegradable – once a structure or furniture made of mycelium and agricultural waste has ended its lifespan, the material can be composted. This means the renewable building block can return to the earth instead of taking up space in landfills.

In addition, mycelium does not need to grow on soil. It can grow within agricultural waste such as used coffee grounds, leaves and bamboo fragments, including food waste. The threads also do not need to compete for land with food crops.

 

How does mycelium work?

 

A closer look at how the fine, mycelium web (centre) binds to bamboo fibre – to form a tightly connected mass. PHOTO: EUGENE SOH, NTU

 

As a fungus grows on the waste, the mycelium net gets thicker, and acts like a natural glue to fuse the loose materials together. Mycelium secretes proteins that allow the threads to bind with the fragments.

This process takes three to four weeks of growth for the web to hold everything together.

Factors affecting mycelium growth include the size and type of agricultural waste, temperature, humidity, amount of light and water, and species of fungus.

 

How do they become bricks?

 

Finished mushroom bricks. PHOTO: DR NAZANIN SAEIDI, SEC

 

The mycelium-based mass goes into a mould to be shaped into a building block to form the bricks. The bricks will then be heated or baked to stop the mycelium from continuing to grow.

 

How are mycelium bricks used?

Building materials made of mycelium or other sustainable materials are much weaker than conventional concrete or steel. Mushroom bricks are weak in tension. Therefore, structures made of mycelium-based blocks need intelligent, structural shapes to make them stable.

 

“Mushroom bricks” (background) made from mycelium and hemp, and after they have been hot-pressed into slabs (foreground). PHOTO: SELINA BITTING

 

Mushroom bricks can be put through a process of compressing to increase their density and their compressive strength.

Mycelium-based materials can also be used as floor tiles and acoustic panels.

  • Sources: Asst prof Hortense Le Ferrand, Dr Juney Lee, World-Archi Tects

 


 

Source The Straits Times