aviation

Could Zero-Emission Hydrogen Help Reduce Aviation Emissions in California?

State’s federally funded hydrogen hub releases aviation whitepaper co-led by CLEE.

Few industries face as complex a challenge in decarbonizing as aviation. While great for decarbonizing on-road transportation, batteries are generally too heavy to power long-distance flights. Low-carbon biofuels blended into fossil jet fuel represent only a partial solution, due to lack of feedstocks and blend limits. Zero-emission hydrogen could represent a solution, either as an …

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State-Level Actions To Decarbonize Aviation

New CLEE report explores the risks of federal preemption.

Aviation is a significant and growing source of greenhouse gas emissions. But the federal government in the United States has failed to address it so far. In response, some state policy makers and advocates are now considering legal avenues to effectively require the use of sustainable aviation fuels, which emit less carbon than traditional jet …

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The Dirty Truth Behind a Feel-Good Energy Story

The San Francisco 49ers just became the first NFL team to buy sustainable aviation fuel. But that move is overshadowed by Big Oil sponsorships in sports.

Did you see the story about a new ‘NFL first’? The San Francisco 49ers announced that it was the first NFL franchise to buy sustainable aviation fuel or SAF —enough to fly from San Francisco to LA for their Sunday game against the LA Rams. The story generated headlines, the way any “first” tends to. …

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The Aviation Endangerment Finding

While we are watching the political conventions, EPA took an important step forward

Last Monday, EPA issued a formal finding that carbon emissions from commercial aviation endanger human health and welfare.   Understanding the significance of the finding requires a little background. Section 231(a)(2) of the Clean Air Act directs the EPA Administrator to “issue proposed emission standards applicable to the emission of any air pollutant from any class …

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