The EPA revoked limits on greenhouse gas emissions from power plants, rejecting decades of settled science to argue that they do not contribute to dangerous air pollution.By Liza GrossOn the heels of the hottest summer on record and a United Nations report warning that global temperatures are likely to push climate risks to ‘increasingly dangerous heights,’ the Trump administration overturned most of a Biden-era rule limiting climate pollution from power plants, the second-largest source of greenhouse gas emissions.