The Environmental Protection Agency (EPA) has proposed rule changes designed to substantially reduce greenhouse gas (GHG) emissions from natural gas and coal-fired power plants.

The updates would strengthen the New Source Performance Standards (NSPS) for newly built gas-fired combustion turbines, and establish guidelines to curb carbon dioxide (CO2) emissions from existing coal and gas-fired steam-generating units.

The proposal also would cap emissions from large, frequently used existing fossil fuel-fired stationary combustion turbines, which generally are natural gas-fired.

“The proposed standards are based on technologies such as carbon capture and sequestration/storage (CCS), low-GHG hydrogen co-firing, and natural gas co-firing, which can be applied directly to power...