The rule may require coal and gas-fired power plants, both new and old, to use carbon and capture sequestration and hydrogen-fueled generation technologies to reduce emissions and achieve an up-to 90% CO2 capture rate by 2035 (for natural gas plants) or 2040 (for existing coal plants scheduled to operate past that date).

The Supreme Court of the United States’ recent decision in West Virginia v. EPA ruled that the Environmental Protection Agency lacks authority under the Clean Air Act to broadly regulate carbon emissions in the US.