Scientists say global warming caused by heat-trapping greenhouse gases has already led to more severe dry weather and heatwaves, melting ice, rising sea levels and flooding.

科学家说，全球变暖是由可吸热的温室提起引起的，全球变暖已经导致更多严重的干燥天气和热浪、融冰、海平面上升和洪灾。