Supreme Court restricts the EPA's authority to mandate carbon emissions

The U.S. Supreme Court on Thursday dealt a major blow to the Environmental Protection Agency’s power to regulate carbon emissions that cause climate change. The decision by the conservative court majority sets the stage for further limitations on the regulatory power of other agencies as well.

By a vote of 6 to 3, the court said that any time an agency does something big and new – in this case addressing climate change – the regulation is presumptively invalid, unless Congress has specifically authorized regulating in this sphere.

At issue in the case were rules adopted by the Trump and Obama administrations and aimed at addressing the country’s single-largest carbon emissions problem – from coal-fired power plants. The Obama plan was broad, the Trump plan narrow. The Obama plan didn’t regulate only coal-fired plants. Instead, it set strict carbon limits for each state and encouraged the states to meet those limits by relying less on coal-fired power plants and more on alternative sources of energy – wind, solar, hydro-electric and natural gas. The goal of the plan was to produce enough electricity to satisfy U.S. demand in a way that lowered greenhouse emissions.