During a global climate summit, President Biden signaled America’s commitment to fighting climate change with an ambitious target: The U.S. will cut its economywide carbon emissions by 50 percent of 2005 levels by 2030.

What became clear is that the rest of the world has become cautious about following the United States’ lead after years of commitments shifting from one administration to the next.

What happened at the summit and how can the U.S. regain its credibility in the struggle against climate change?

Guest: Coral Davenport, who covers energy and environmental policy for The New York Times, with a focus on climate change.

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Background reading:

• At the virtual summit meeting he convened, Mr. Biden cast the fight against global warming as an economic opportunity for the world and committed the U.S. to cutting its carbon emissions by half.

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