changes in the world's weather, in particular the fact that it is believed to be getting warmer as a result of human activity increasing the level of carbon dioxide in the atmosphere

The President called for urgent action on climate change. 总统呼吁采取紧急行动应对气候变化。

climate change talks/summit/meeting 气候变化会谈/峰会/会议

a climate change sceptic/denier (= someone who does not believe that climate change is happening or that humans are responsible) 气候变化怀疑论者/否认论者（=不相信气候变化正在发生或人类应负责任的人）。