Shift Key with Robinson Meyer28 Touko 2025

Shift Key Classic: The World Will Miss 1.5C. What Comes Next?

Shift Key is off this week for Memorial Day, so we’re re-running one of our favorite episodes from the past. With Republicans in the White House and Congress now halfway to effectively repealing the Inflation Reduction Act, the United States’ signature climate law, we thought now might be a good moment to remind ourselves why emissions reductions matter in the first place.

To that end, we’re resurfacing our chat from November with Kate Marvel, an associate research scientist at Columbia University and the NASA Goddard Institute for Space Studies. At the time, Trump had just been reelected to the presidency, casting a pall over the annual United Nations climate conference, which was then occurring in Azerbaijan. Soon after, he fulfilled his promise to pull the U.S. out of the Paris Agreement, with its goal of restraining global warming to 1.5 degrees Celsius over pre-industrial levels.

In this episode, we talk with Kate about why every 10th of a degree matters in the fight against climate change, the difference between tipping points and destabilizing feedback loops, and how to think about climate change in a disappointing time. Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.

Mentioned:

The GOP Tax Bill Is a Dangerous Gamble at a Precarious Moment

The UN Environmental Program’s emissions gap report

The IPCC’s monumental report on the risks of 1.5C of temperature rise

Jesse’s post-Trump op-ed: Trump Is Not the End of the Climate Fight

Rob’s piece from 2023 on the “end of climate science”

Trump’s Energy Secretary-designate Chris Wright’s speech at the American Conservation Coalition Summit

Music for Shift Key is by Adam Kromelow.

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