The United States Senate has adopted an amendment to an international environmental treaty that would phase out the use of planet-warming greenhouse gases in a move hailed as a major step to confront the climate crisis.
In a 69-27 vote on Wednesday, the Senate ratified the Kigali Amendment to the Montreal Protocol, pledging to end the use of hydrofluorocarbons (HFCs), commonly used in heating, ventilation, air conditioning and refrigeration.
