The first of the new EPA rules updates a provision of the Clean Air Act to require existing coal-fired power plants and new natural gas plants to control 90% of their carbon pollution through technologies like carbon capture.

One provision of the rule tightens the emissions standard for toxic metals by 67%. The other requires a 70% reduction in the mercury emissions standard specifically from lignite coal-fired power plants.

A third rule would reduce waste water pollutants from coal-fired power plants by over 660 million pounds per year, according to the EPA, with the goal of protecting freshwater and drinking water resources for communities around the country.