serious problems that are being caused or likely to be caused by changes in the world's weather, in particular the world getting warmer as a result of human activity increasing the level of carbon dioxide in the atmosphere

Children all over the world marched to raise awareness of the climate crisis. 世界各地的儿童为提高人们对气候危机的认识而举行游行。

He indicts the government, media, and even environmentalists for not doing enough about this climate crisis. 他指责政府、媒体、甚至环保主义者在应对气候危机方面做得还不够。