The U.S. Environmental Protection Agency (EPA) has finalized a rule stating that greenhouse gas (GHG) emissions from electric utility generating units (EGUs) significantly contribute to air pollution that endangers public health and welfare. This determination is based on a framework where EGUs, due to their large emissions, surpass the established 3-percent threshold of total U.S. GHG emissions. While other factors could also influence this decision, the major emissions from EGUs alone justify regulation. The rule does not expect to impact energy supply, costs, or emissions notably.
Simple Explanation
The EPA made a rule saying that power plants make a lot of greenhouse gases, which are bad for the air and make people sick, so it's important to control these gases to keep us safe.