Environmental Protection Agency regulations regarding carbon dioxide emissions for new coal plants were published in the Federal Register Wednesday – three and a half months after the EPA issued the rules.

The new coal regulations would limit carbon emissions for newly built coal plants to 1,000 pounds of carbon dioxide per megawatt hour for large coal plants and 1,100 pounds per megawatt hour for smaller plants. Considering the average emissions from existing coal plants is currently 1,800 pounds per megawatt hour, the new rules will likely be tough to meet.