Senate votes to phase out climate-warming chemicals; Scott Denning provides context

The U.S. Senate voted to ratify an international treaty on Sept. 21 and join 137 other countries in agreeing to phase out a class of climate-warming chemicals that are widely used as coolants in refrigerators, air conditioners and heat pumps. Professor Scott Denning explains why this is important in his piece for The Conversation, “US Senate ratifies treaty to phase down climate-warming HFCs from refrigerators and air conditioners – but what will replace them this time?”