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What is the carbon footprint of space tourism?

What is the carbon footprint of space tourism?

Amazon founder Jeff Bezos does not appear best pleased with Richard Branson stealing some of his thunder with the Virgin Galactic launch: Branson went 53 miles (85 kilometers) into suborbital space on Sunday while Bezos has a self-funded trip to space planned for July 20. Bezos published a document comparing his Blue Origin to Branson’s Virgin Galactic, including its impact on the ozone layer.

Source: Blue Origin

The fine print at the bottom notes that “a liquid hydrogen/liquid oxygen rocket engine (which Blue Origin uses) has 100X less ozone loss and 750X less climate forcing magnitude than an air-launched hybrid engine (which Virgin Galactic uses).”

But what is the carbon impact of a flight? Neither Blue Origin nor Virgin Galactic has been particularly transparent about the carbon footprints of their ventures, and all we can do is guess.

 

Virgin Galactic

Virgin Galactic has only said that it is equivalent to a business class return ticket on a transatlantic flight, which the Financial Times calculates to be 1,238 kilograms of carbon dioxide per person.

 

Source: Virgin Galactic

 

A much earlier article in the Wall Street Journal suggests that it is higher:

“According to the U.S. Federal Aviation Administration’s environmental assessment of the launch and re-entry of Virgin Galactic’s spacecraft, one launch-land cycle emits about 30 tons of carbon dioxide, or about five tons per passenger. That is about five times the carbon footprint of a flight from Singapore to London.”

 

For something that isn’t going to happen very often, that isn’t such a big deal, even if it is nothing more than an expensive joyride. But as in everything else these days, you have to go beyond just the fuel burn.

The Virgin Galactic plane burns HTPB (Hydroxyl-terminated polybutadiene) and nitrous oxide, sometimes referred to as rubber cement and laughing gas. HTPB is the main ingredient of polyurethane and is made from butadiene, a hydrocarbon extracted during the steam cracking process used to make ethylene. The heat needed to make the 900 degrees Celcius steam comes from natural gas, and one study estimated there is about a metric ton of CO2 emitted for every metric ton of ethylene, so it probably is about the same for butadiene.1 So that would mean that emissions including upstream manufacturing emissions of the fuel are double, or about 60 metric tons of CO2.

This doesn’t include the fuel used for the big plane that carried the craft up, and of course, it doesn’t include the embodied carbon from building the whole operation.

 

Blue Origin

Bezos’ New Shepard is a rocket, not a space plane, and needs a little more oomph to get off the ground, so it is running on liquid hydrogen and liquid oxygen. The products of combustion are water and a tiny bit of nitrogen oxide.

 

Launch of New Shepard. Source: NASA

 

However, hydrogen has a big carbon footprint of its own. Most of it is “grey” hydrogen made by steam reformation of natural gas, a process that releases 7 kilograms of CO2 per kilogram of hydrogen. Compressing it and cooling it into liquid hydrogen is also energy-intensive; in an earlier post, the company making it said it took 15 kilowatt-hours of electricity per kilogram of hydrogen. A lot of liquid hydrogen is made in Texas, where according to the U.S. Energy Information Administration, the electricity emits 991 pounds of CO2 per megawatt-hour, or 0.449 kilograms per kilowatt-hour, or 6.74 kilograms per kilogram of hydrogen.2 That totals roughly 14 kilograms of CO2 per kilogram of liquid hydrogen.

Compressing and liquifying oxygen is energy intensive too: according to engineer John Armstrong, to produce one metric ton of liquid oxygen (LOX) you need about 3.6 megawatt-hours of electricity. Applying Texas electricity, you get 1.61 kilograms of CO2 making 1 kilogram of LOX.

 

Source: Reddit

 

Bezos hasn’t released any details on the amount of fuel it takes to launch his rocket, but a Redditor did some estimates and came up with 24,000 kilograms of fuel. At a 5.5 mix ratio (hydrogen is really light, 1/16 the weight of oxygen) you get:

  • 4363 kilograms of hydrogen X 14 kilograms of CO2 = 61 metric tons of CO2
  • 19637 kilograms of oxygen x 1.61 kilograms of CO2= 31.6 metric tons of CO2
  • Totalling 93 metric tons of CO2 per launch

 

None of this includes the incalculable upfront carbon emitted making all the prototypes and infrastructure and the rockets and planes themselves, a Life Cycle Analysis of the whole enterprise would be mind-boggling, but that is another story.

 

So What’s the Big Deal?

In the larger scheme of things, it’s not much, with Virgin Galactic at 60 metric tons of CO2, Blue Origin at 93 metric tons. After all, a full 777-200 going from Chicago to Hong Kong pumps out 351 metric tons and that kind of flight happens many times per day. It’s carrying many more people many more miles, but the total CO2 emissions from flying dwarf that of these rockets.

It looks even less dramatic when you compare it to the average footprint of the billionaire who could afford a $250,000 ticket; he probably already has a carbon footprint of 60 to 80 metric tons per year flying private between multiple residences.

In the end one can probably conclude that we don’t need fewer rockets and less space tourism, we need fewer billionaires.

 


 

Source Treehugger

Amazon signs big allies in pledge to be carbon neutral

Amazon signs big allies in pledge to be carbon neutral

SEATTLE—Amazon has attracted new allies for The Climate Pledge that founder and CEO Jeff Bezos announced last September.

Indian information technology consulting giant Infosys, U.S. wireless market share leader Verizon and U.K. consumer goods manufacturer Reckitt Benckiser Group (RB) signed the pledge, which calls on companies to eliminate or offset all greenhouse gas emissions by 2040.

The three large companies, based on three continents and in three very different industries, illustrate the range of challenges and corporate approaches to the climate emergency, which continues amid widespread protests against systemic racism and a global pandemic — both adding urgency and complexity to the climate response.

Through these unprecedented challenges, Amazon has “stayed the course” on the pledge, according to Kara Hurst, Amazon vice-president and head of worldwide sustainability. Each Amazon business unit is developing internal goals to decarbonize, she said via email. Business leaders are given emissions information “so they can incorporate that into their decision-making.”

The addition of new signatories to The Climate Pledge “will drive a new wave of investments and development of innovative low carbon products and services that will be required to meet their commitments,” Hurst said in a corporate blog post.

But even as more companies join — Amazon says several more announcements are in the offing — activists question the adequacy of The Climate Pledge target, touted by Bezos as a decade earlier than the Paris Agreement’s emission reductions that scientists say preserve a chance of limiting global warming to 2 C (3.6 F) above pre-industrial levels.

“Amazon’s Climate Pledge raises more questions than it answers about how major companies will successfully decarbonize their operations. Science has shown the next ten years matter the most to slow the climate emergency — 2040 may be too late,” Elizabeth Jardim, senior corporate campaigner with Greenpeace USA, said in a statement after Amazon announced the new signatories to The Climate Pledge.

Amazon Employees for Climate Justice, whose pressure campaign in late 2018 and 2019 preceded Bezos’ Climate Pledge announcement, want the company to reach zero emissions by 2030.

Each of the three companies comes to The Climate Pledge with some goals already in place — including some surpassing the pledge targets — and challenges and opportunities specific to their businesses.

Infosys, for example, began reporting its greenhouse gas emissions, largely from diesel generators at corporate campuses, electricity use and business travel, in 2008 — a step Amazon took for the first time last year, disclosing 2018 emissions of 44.4 million tons of carbon dioxide equivalent (CO2e)

Infosys pledged in 2011 to be carbon neutral in 2018, and set an internal price on carbon emissions in 2017. It pushed the carbon neutral goal back to 2020 and has again delayed it, until 2021, citing in its latest corporate sustainability report “the unprecedented COVID-19 scenario and the resulting uncertainties.”

Infosys reported fiscal year 2020 direct and indirect emissions (such as fuel combustion for operations and emissions from purchased electricity) of 139,407 tons of CO2e. The company reported an additional 151,502 tons of CO2e from emissions generated by activities up and down the supply chain but outside of a company’s direct control.

In addition to focusing on its own operations, Infosys has invested heavily in emissions offsets — payments to third parties for practices expected to avoid emissions or remove greenhouse gases from the atmosphere, such as switching to more efficient cook stoves or planting trees. The company reports a portfolio of offset credits sufficient to cancel out 461,626 tons of CO2e, from projects to bring biogas systems and stoves that don’t use firewood to people in rural villages.

Verizon has, in the last 18 months, accelerated efforts to reduce its greenhouse gas emissions, said James Gowen, the company’s chief sustainability officer and vice-president of supply chain operations.

“Earlier this year, our CEO reiterated our commitment to the Paris Agreement,” Gowen said in an email. “So when Jeff and his team reached out about The Climate Pledge, we saw this as the perfect way to continue to expand the breadth and boldness of our program.”

In 2018, Verizon’s direct and indirect emissions were just over 4.4 million tons of CO2e. It also accounted for 98,188 tons of CO2e from business travel.

Some 91 per cent of the company’s direct and indirect emissions came from electricity used to power its networks, providing a relatively straightforward pathway to decarbonization through improving cooling systems and testing higher operating temperatures in network facilities, and purchases of wind and solar energy. The company last year pledged to be carbon neutral by 2035.

Verizon in February announced plans to purchase more renewable energy, drawing on a $1 billion (U.S.) bond issue devoted to emissions reductions, but it ranks last among the four largest U.S. wireless providers in clean energy usage, according to a report released Tuesday by Green America, a non-profit pursuing social justice and environmental health through consumer-driven economic changes, and based on corporate disclosures of 2018 energy use.

T-Mobile ranked first with a commitment to reach 100 per cent renewable energy next year.

RB, which makes a range of consumer products under brand names including Lysol, Clearasil and Woolite, announced it was accelerating its climate mitigation plans earlier this month.

The company reports emissions in 2019 totalled 36.4 million tons of CO2e. More than three-quarters of its reported emissions are related to consumer use. In addition to moving to 100 per cent renewable energy by 2030 and investing in efficiency improvements at its factories, the company is trying to drive changes in consumer behaviour.

Critics of corporate climate pronouncements call out their reliance on emissions offsets to reach the goal.

There is broad agreement that it’s important to incentivize these practices, including the natural climate solutions such as reforestation and wetlands preservation that one widely cited study estimates could account for more than a third of emissions reductions needed by 2030. But their use to balance out ongoing corporate emissions from things with no immediate zero-carbon alternative, such as air transportation and steel production, continues to draw skepticism.

Amazon declined to say how much of its 2040 greenhouse-gas footprint it anticipates “neutralizing” through the use of offset credits, nor would it specify requirements, if any, embedded in The Climate Pledge.

Each company that signs the pledge “will have its own needs and will map out its own journey to become net zero, and offsets should only be the last piece of the puzzle for any remaining emissions,” Hurst said, adding that offsets must be “additional, quantifiable, real, permanent, and socially beneficial.”

“For Amazon’s Climate Pledge to be a credible effort we need far more transparency than simply reporting emissions data,” Greenpeace’s Jardim said. “We need concrete plans for how companies will transition off fossil fuels in the next decade, as well as commitments to prioritize deep decarbonization pathways over carbon offsetting.”

 


Source www.thestar.com

Jeff Bezos pledges $10 billion to fight climate change

Jeff Bezos pledges $10 billion to fight climate change
  • Jeff Bezos said he’s giving $10 billion to fight climate change and has launched a new initiative called the Bezos Earth Fund.
  • Bezos has an estimated net worth of about $130 billion.
  • “We can save Earth,” he said in a post on Instagram. “It’s going to take collective action from big companies, small companies, nation states, global organizations, and individuals.”

Jeff Bezos said on Monday that he’s giving $10 billion to fight climate change.

The Amazon CEO and richest man in the world announced in a post on Instagram that he’d start the Bezos Earth Fund. He said he expects to start giving out grants this summer.

With an estimated net worth of nearly $130 billion, his pledge accounts for about 7.7% of his wealth.

“Climate change is the biggest threat to our planet,” Bezos said. “I want to work alongside others both to amplify known ways and to explore new ways of fighting the devastating impact of climate change on this planet we all share.”

 

View this post on Instagram

Today, I’m thrilled to announce I am launching the Bezos Earth Fund.⁣⁣⁣ ⁣⁣⁣ Climate change is the biggest threat to our planet. I want to work alongside others both to amplify known ways and to explore new ways of fighting the devastating impact of climate change on this planet we all share. This global initiative will fund scientists, activists, NGOs — any effort that offers a real possibility to help preserve and protect the natural world. We can save Earth. It’s going to take collective action from big companies, small companies, nation states, global organizations, and individuals. ⁣⁣⁣ ⁣⁣⁣ I’m committing $10 billion to start and will begin issuing grants this summer. Earth is the one thing we all have in common — let’s protect it, together.⁣⁣⁣ ⁣⁣⁣ – Jeff

A post shared by Jeff Bezos (@jeffbezos) on

 

The move follows pressure from Amazon employees to push the company to do more to fight climate change. More than 350 employees signed a Medium blog in January calling for net-zero emissions by 2030, among other requests.

In September, Bezos announced Amazon’s climate pledge to get the company carbon-neutral by 2040, 100% renewable energy by 2030, and 100,000 electric delivery vehicles by 2030.

Bezos is the only American among the world’s five richest people who has not signed the Giving Pledge, in which participants promise to give away more than half of their wealth during their lifetimes or in their wills, Business Insider’s Paige Leskin wrote. His ex-wife, MacKenzie Bezos, signed the pledge in May.

His full Instagram post read:

Today, I’m thrilled to announce I am launching the Bezos Earth Fund.⁣⁣⁣
⁣⁣⁣
Climate change is the biggest threat to our planet. I want to work alongside others both to amplify known ways and to explore new ways of fighting the devastating impact of climate change on this planet we all share. This global initiative will fund scientists, activists, NGOs — any effort that offers a real possibility to help preserve and protect the natural world. We can save Earth. It’s going to take collective action from big companies, small companies, nation states, global organizations, and individuals. ⁣⁣⁣
⁣⁣⁣
I’m committing $10 billion to start and will begin issuing grants this summer. Earth is the one thing we all have in common — let’s protect it, together.⁣⁣⁣
⁣⁣⁣
—Jeff