全球气温变暖的主要原因：人类活动对气候变化肯定是有变化和影响的。

The main reason for global warming: human activities definitely have an impact on climate change.

youdao

全球气温变暖的主要原因：人类活动对气候变化肯定是有变化和影响的。

The main reason for global warming: human activities definitely have an impact on climate change.

youdao