CNN —The Senate ratified an international climate treaty to phase out hydrofluorocarbons – potent greenhouse gases used in air conditioning and refrigeration. In 2016, the United Nations struck an agreement known as the Kigali Amendment to the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer. The Kigali amendment is supported by business groups like the Chamber of Commerce and environmental groups like the Natural Resources Defense Council. “Today’s Senate vote was a decade in the making and a profound victory ​for the climate and the American economy,” said US Special Presidential Envoy for Climate John Kerry. And in May, the Senate Foreign Relations Committee sent the ratification of the Kigali Amendment to the Senate floor without opposition.

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