Many refer to climate change as the biggest challenge confronting mankind today.

许多人说到气候变化，都把它称之为人类当今面临的最大的挑战。

youdao

Many refer to climate change as the biggest challenge confronting mankind today.

许多人说到气候变化，都把它称之为人类当今面临的最大的挑战。

youdao