Casey Crownhart

@caseycrownhart.bsky.social

Climate tech reporter at MIT Technology Review ~ big fan of batteries and also the New York Mets. Want me in your inbox? Sign up for The Spark: technologyreview.com/spark

Solar geoengineering is often portrayed as a relatively cheap and easy fix for climate change. But as researchers take a harder look at the nuts and bolts of the concept, they’re finding numerous uncertainties, missing machines, and big things that would still need to be built (like polar airports).

Hacking the atmosphere: Geoengineering gets a reality check

Researchers are starting to explore the tools and systems we need to develop to cool down the planet.

ter.li

More & more solar geoengineering research is moving beyond computer modeling, delving into the design & engineering work needed to develop aircraft, dispersion systems & more. Much of it is happening at @davidkeith.bsky.social's new group at the University of Chicago: Freebie link for my latest:

Hacking the atmosphere: Geoengineering gets a reality check

Researchers are starting to explore the tools and systems we need to develop to cool down the planet.

ter.li

I'm @ Google I/O in sunny Mountain View today, and I'll be sharing my thoughts here throughout the day. We're just over halfway through the keynote now, and one thing is already pretty obvious—Google isn't coming for Anthropic and OpenAI's shared agentic coding crown anytime soon

A scoop: DHS is using AI video generators from Google and Adobe to make content shared with the public. It comes as workers in tech have put pressure on their employers to denounce the agency's activities. www.technologyreview.com/2026/01/29/1...

DHS is using Google and Adobe AI to make videos

Immigration agencies have been flooding social media with bizarre, seemingly AI-generated content. We now know more about what might be making it.

technologyreview.com

If there's an energy or climate star who you think should be on our 35 Innovators Under 35 list this year, please shoot me a DM. Please do not just @reply with their name or handle here (awkward).

I did a lengthy interview with the CEO of Stardust, in which he walked back the solar geoengineering startup's testing and deployment plans a bit. The company also intends to release details about its proprietary particles early next year and expects to open a US office soon.

How one controversial startup hopes to cool the planet

And why many scientists are freaked out about the first serious for-profit company moving into the solar geoengineering field.

technologyreview.com

The Data Foundation is fundraising for a new initiative that will coordinate efforts among nonprofits, experts & companies to modernize US greenhouse-gas measurements, striving to build on a Biden effort that Trump nullified on his first day in office.

How nonprofits and academia are stepping up to salvage US climate programs

The Data Foundation, the American Geophysical Union, and a coalition of universities are scrambling to ensure that the nation accurately assesses the growing dangers of global warming.

technologyreview.com

I dug into the NSF cuts & other ways that the Trump administration is shutting down climate science. “Basically it’s a shit show,” Princeton’s Michael Oppenheimer says, “and how bad a shit show it is will depend a lot on what happens in the courts and Congress over the next few months.”

The Trump administration has shut down more than 100 climate studies

Tens of millions of dollars in NSF grants have been slashed, and scientists fear the US is about to lose a generation of climate researchers.

technologyreview.com

We’re all talking about AI and energy demand, but there’s still a lot of question marks. So @jamesmodonnell.bsky.social and I got together and did some math. After six months of reporting, we found that AI's energy demand is anything but constant, and the common understanding is full of holes.

We did the math on AI’s energy footprint. Here’s the story you haven’t heard.

The emissions from individual AI text, image, and video queries seem small—until you add up what the industry isn’t tracking and consider where it’s heading next.

technologyreview.com

In 2019 I was the first journalist to embed within OpenAI to profile them. Afterwards they refused to speak to me for 3 years. Here's the story of what happened, and Altman’s reaction, excerpted from my book EMPIRE OF AI about the company (out May 20). 1/ www.technologyreview.com/2025/05/19/1...

Inside the story that enraged OpenAI

In 2019, Karen Hao, a senior reporter with MIT Technology Review, pitched writing a story about a then little-known company, OpenAI. This is what happened next.

technologyreview.com