Steve February 20, 2021
Climate change

Read time: 7 mins

By Morgan Bazilian, Colorado School of Mines; Deb Niemeier, University of Maryland; Edward R. Carr, Clark University; Kristie Ebi, University of Washington, and Walt Meier, NASA

The United States is formally back in the Paris climate agreement as of February 19, 2021, nearly four years after former President Donald Trump announced it would pull out.

We asked five scholars what the U.S. rejoining the international agreement means for the nation and the rest of the world, including for food security, safety and the changing climate. Nearly every country has ratified the 2015 agreement, which aims to keep global temperature rise well below 2 degrees Celsius. The U.S. was the only one to withdraw.

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