Court Scuttles Rule Cutting Potent Greenhouse Gas

[ Originally published on this site as post ]

One of the most powerful climate pollutants on earth, hydrofluorocarbons or HFCs, account for a small portion of U.S. climate pollution, but scientists say it’s important for countries to urgently cut them just because they’re so potent — and growing.

Efforts to cut HFCs became more difficult both in the U.S. and globally on Tuesday, when a federal appeals court in Washington, D.C., ruled that the Environmental Protection Agency has overstepped its authority in regulating HFCs under the Clean Air Act.

As the world warms, the use of air conditioning is increasing and many of those units use HFCs, a coolant harmful to the climate. Credit: Matthew Klein/flickr

The ruling leaves the U.S. without an immediate