答：气候变化问题是全人类面临的重大挑战。

A: the issue of climate change is a major challenge facing the entire human race.

youdao

答气候变化问题是全人类面临的重大挑战。

The issue of climate change is a major challenge facing the entire human race.

youdao

答气候变化问题是全人类面临的重大挑战。

The issue of climate change is a major challenge facing the entire human race.

youdao