What's at stake if the world doesn't act on climate change
Clip: 11/01/2021 | 10m 32s | Video has closed captioning.
In his remarks to global leaders, President Joe Biden said climate change is "ravaging the world" — a message that is likely to be repeated at the U.N. summit on climate change. World leaders, researchers and activists all say we are at a tipping point to reduce emissions. But getting commitments that translate to real change is no small lift. William Brangham reports on the stakes of the summit.
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