The EPA has just announced new rules for power plants to clean up their act. But to get to those lower limits, companies might have to switch to two largely untested technologies in the power sector: hydrogen production and carbon capture.This episode was produced by Avishay Artsy, edited by Amina Al-Sadi, fact-checked by Laura Bullard and Amanda Lewellyn, engineered by Paul Robert Mounsey, and hosted by Noel King.Transcript at vox.com/todayexplained  Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcastsLearn more about your ad choices. Visit podcastchoices.com/adchoices