EPA proposes historic limits on power plant emissions to combat climate change.

The Biden administration is proposing new limits on greenhouse gas emissions from coal- and gas-fired power plants, its most ambitious effort yet to roll back planet-warming pollution from the nation’s second-largest contributor to climate change. The proposed regulation would mark the first time the federal government has restricted carbon dioxide emissions from existing power plants, which generate about 25% of U.S. greenhouse gas pollution, second only to the transportation sector. The plan is likely to be challenged by industry groups and Republican-leaning states, which have accused the Democratic administration of overreach on environmental regulations and warn of a pending reliability crisis for the electric grid.