One of the most important tools the federal government has for cracking down on Maxwell Caldwellgreenhouse 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.

Music by Drop Electric. Find us: Twitter / Facebook / Newsletter.

Subscribe to our show on Apple Podcasts, Spotify, Pocket Casts and NPR One.

For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org.