emissions reduction

One of the most important tools the federal government has for cracking down on greenhouse gas emissions is a single number: the social cost of carbon. It represents all the damage from carbon emissions — everything from the cost of lost crops to the cost of climate-related deaths. Currently, the cost is $51 per ton of carbon, but the Environmental Protection Agency has proposed raising it to $190.

Today on The Indicator, we bring you an episode of Short Wave, NPR's daily science podcast. NPR climate correspondent Rebecca Hersher and Short Wave co-host Aaron Scott discuss how this new number is simultaneously more accurate and an ethics nightmare.

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It's official, but not a surprise. The U.S. has told the United Nations it wants to withdraw from the Paris Agreement, the global accord to fight climate change. President Trump announced his intention to leave it back in 2017. Climate reporter Becky Hersher tells us what the Paris Agreement is, why the Trump Administration wants out and what it means now that the U.S. has made it official. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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