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Justine Calma

Justine Calma

Senior Science Reporter

Justine Calma is a senior science reporter at The Verge, where she covers energy and the environment. She’s also the host of Hell or High Water: When a Disaster Hits Home, a podcast from Vox Media and Audible Originals. Since reporting on the adoption of the Paris agreement in 2015, Justine has covered climate change on the ground in four continents. "Power Shift" her story about one neighborhood’s fight for renewable energy in New Orleans was published in the 2022 edition of The Best American Science and Nature Writing.

Find her on Instagram, Threads, Bluesky, and X.

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J.D. Vance has flip-flopped on climate change like he’s flip-flopped on Trump.

Trump’s new running mate went from saying “we have a climate problem” in 2020 to being “skeptical of the idea that climate change is caused purely by man,” The New York Times reports. (Research shows greenhouse gas emissions from human activity are to blame.) Vance suddenly threw his support behind Trump, pushed to repeal EV tax credits and rollback pollution regulations.


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GM to pay millions in fines after causing more carbon pollution than it said it would.

Emissions from nearly 6 million of its vehicles were about 10 percent higher on average than GM said they were on its greenhouse gas emission compliance reports, an EPA investigation found. GM will retire 50 million metric tons of carbon credits to make up for the excess tailpipe pollution. It’ll also pay $145.8 million in penalties.


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Four volunteers spent more than a month pretending to be stuck on Mars.

Their simulated mission to Mars tested “how future astronauts may react to isolation and confinement during deep-space journeys,” according to NASA. The crew of four went through 18 health studies during their stint at a 650-square-foot habitat at the Johnson Space Center in Houston.

Outside of each other’s company, the crew kept four pet triops shrimp: Buzz, Alvin, Simon, and Theodore.