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US Senate ratifies treaty to phase down climate-warming HFCs from refrigerators and air conditioners – but what will replace them this time?

  • Written by Scott Denning, Professor of Atmospheric Science, Colorado State University
US Senate ratifies treaty to phase down climate-warming HFCs from refrigerators and air conditioners – but what will replace them this time?Air conditioners are one source of leaking HFCs.Bruce Yuanyue Bi/The Image Bank via Getty Images

The U.S. Senate voted to ratify an international treaty on Sept. 21, 2022, 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.

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