Good luck Halley! Hope you find better support for the terrific work you do.

Another Way Companies Majorly Undercount Their Emissions The most popular scope 3 models assume an entirely American supply chain. That doesn’t square with reality.

“The most popular scope 3 models assume an entirely American supply chain. That doesn’t square with reality.” Deft summary of our latest paper by @emilypont.bsky.social in @heatmap.news: heatmap.news/sustainabili...
Open access paper here: www.nature.com/articles/s41...

Hydrogen emissions are ‘supercharging’ the warming impact of methane - Carbon Brief The warming impact of hydrogen has been “overlooked” in projections of climate change, authors of the latest “global hydrogen budget” say.

The Global Carbon Project has just published the most comprehensive Global Hydrogen Budget to date.

H2, although not a GHG, has an indirect Global Warming Potential 37 times more potent than CO2.

Carbon Brief:
www.carbonbrief.org/hydrogen-emi...

Research paper:
www.nature.com/articles/s41...

Thanks for all your help with the analysis, @climatefran.bsky.social !

An update of the Global Hydrogen Budget.

The biggest source of H2 into the atmosphere is oxidation of CH4 and NMVOCs. So if you care about the climate effects of H2, reduce your CH4 emissions...

www.nature.com/articles/s41...

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Thanks for noticing, Damian. In case useful, we also put together a research brief about the new paper here: drive.google.com/file/d/1ObuE...

Year in research 2025 Explore a personalised summary of your research's reach and impact in 2025 and share highlights with friends and colleagues.

Kind of cool, Nature now assembling summaries of annual “research impact”: yir.sn.pub/xowQO5 #SNAuthors #YiR2025

Hot take: people who insist on backing into parking spots are a blight upon the Earth.

The Stanford Doerr School of Sustainability is searching for a tenure-rank faculty in climate science. Candidates must have an exceptional record of scholarly work, be interested in interdisciplinary approaches and demonstrate a dedication to teaching. facultypositions.stanford.edu/en-us/job/49...

E.P.A. to Stop Updating Popular Database After Lead Scientist Criticized Trump

Excited to help continue support for this open source model and dataset at Stanford in collaboration with Wes Ingwersen and Watershed.
www.nytimes.com/2025/08/08/c...

Have spent most of July in the U.K., soaking up history, natural beauty, scientific ideas (and a fair amount of weak & warm beer). Back home tomorrow.

Submit an abstract to our @agu.org session GC077 by July 30th!

Geophysical Constraints of Climate Solutions:

-clean energy tech
-adaptation solutions
-resilient energy transitions

agu.confex.com/agu/agu25/pr...

@lfreese.bsky.social
@stevenjdavis.bsky.social
@michaeldavidson.bsky.social

Psyched to have this formalized! We’re recruiting motivated students and postdocs who like to think big.

Ignoring news and spending cocktail hour with a Naked and Famous (but subbed out my precious Chartreuse with Maine-made Handshake digestif)

Trump administration fires staff for flagship U.S. climate assessment Move could open the door to using high-profile report to attack climate science

@science.org confirms that yesterday the Trump admin wiped out the technical staff of the U.S. National Climate Assessment and the Global Change Research Program. When USGCRP's acting director, who is on a time-limited contract, leaves, it will leave the congressionally mandated office empty.

I think the void is actually hearing my screams and mocking me

Decarbonization can improve energy security - Nature Climate Change Moving towards net-zero carbon emissions reduces reliance on fossil fuels but requires geographically concentrated materials for clean energy technologies. Now research finds countries can reduce emer...

New piece from me published in Nature Climate Change: Decarbonization can improve energy security, robust trade and a circular economy increases energy security, and critical minerals are not like oil. 🔌💡

Journal link: www.nature.com/articles/s41...

Open access link: rdcu.be/eg3lR

Trade risks to energy security in net-zero emissions energy scenarios Nature Climate Change - Trade risks associated with fossil fuels and critical materials matter for energy security, and will evolve with the low-carbon transition. Here the researchers find that...

Ironically, our new paper on trade risks of net-zero energy systems, ~2 years in the making, has landed on the same day as the U.S. imposes sweeping tariffs on many of its trading partners.

rdcu.be/eg1ya

Nice sunset walk at the Dish yesterday. Nature’s first green is gold!

You don’t have the cards, lady.

Really sorry to hear this, Zack. Let me know if you need a rec letter, because I have lots of great things to say.

True today, but not at net-zero.

Asteroid fragments upend theory of how life on Earth bloomed Samples from Bennu contain the chemical building blocks of life — but with a twist.

14 amino acids (left- and right-handed)! Ammonia! Formaldehyde!

We are but stardust: mundane and transcendent.

My gosh, what a time to be alive!

www.nature.com/articles/d41...

www.nature.com/articles/s41...

www.nature.com/articles/s41...

A path to US Tribal energy sovereignty

Our new perspective in @science.org imagines a role for Tribal energy resources that is mutually beneficial to U.S. energy security and Tribe’s economic prosperity. With my brilliant colleague @mbazilian.bsky.social www.science.org/doi/10.1126/...

How long has 350.org been a thing?

Building materials could store more than 16 billion tonnes of CO2 annually Achieving net-zero greenhouse gas emissions likely entails not only lowering emissions but also deploying carbon dioxide (CO2) removal technologies. We explored the annual potential to store CO2 in building materials. We found that fully replacing ...

Replacing conventional building materials with materials modified to store carbon dioxide could move the planet closer to net-zero greenhouse gas emissions, according to a new study in Science.

Built to remove carbon Building materials could facilitate long-term removal of atmospheric carbon dioxide

Grateful to industry guru @chrisbataille.bsky.social for a great related perspective: www.science.org/doi/10.1126/...

Building materials could store more than 16 billion tonnes of CO2 annually Achieving net-zero greenhouse gas emissions likely entails not only lowering emissions but also deploying carbon dioxide (CO2) removal technologies. We explored the annual potential to store CO2 in bu...

Our analysis out today in @science.org and led by Elisabeth Van Roijen (of NREL and formerly @ucdavis.bsky.social) shows that building materials--and especially concrete--are an enormous potential reservoir to store carbon (we think >16 Gt CO2 / yr). www.science.org/doi/10.1126/...

Post-storm sunrise on the shores of Lake Tahoe this past Saturday.

Wow, that one looks terrific! Enjoy.