The Environmental Protection Agency is repealing rules that limit planet-warming greenhouse gas emissions from power plants fueled by coal and natural gas. The agency says the action would save industry more than $300 billion in costs and help “unleash” American energy. The EPA also proposed a separate step to prevent future administrations from regulating climate pollution from power plants. Elimination of the power plant rule represents a fundamental shift from efforts by Democratic Presidents Joe Biden and Barack Obama to address climate change and clean up industrial pollution.