The Trump administration has proposed replacing a signature Obama-era climate policies.
Reuters reports the change would let states write their own rules on coal-fired power plants.
The move prompting critics to warn of dire environmental and health consequences.
The EPA proposal would require states to submit plans for improving efficiency of coal-fired power plants.
The federal government will set carbon emission guidelines.
States will have the leeway to set less-stringent standards.
The rule also could allow power plant owners to sidestep costly permits for those improvements.