Delegates from 195 nations have signed a landmark agreement that commits countries to cutting greenhouse gas emissions by 50% before 2035.
The deal includes a new fund to help developing nations transition to renewable energy, with wealthy countries pledging $100 billion annually.
UN Secretary-General called it "a turning point for humanity," while climate activists said the targets still fall short of what science demands.
Implementation will be monitored through a new international verification system, with penalties for nations that fail to meet their commitments.
