170 nations sign the Kigali Amendment to phase down HFCs
The Kigali Amendment, signed in October 2016 by around 170 nations, committed the world to phasing down hydrofluorocarbons — refrigerant gases thousands of times more heat-trapping than CO₂. Building on the ozone-saving Montreal Protocol, full implementation could prevent roughly half a degree Celsius of warming by 2100, a rare case of climate diplomacy working quickly and at scale.









