The UN Warns of a Looming Climate Crisis

Iceberg floating in the Nuup Kangerlua Fjord in southwestern Greenland, 2017. Greenland's glaciers have been melting and retreating at an accelerated pace in recent years due to warmer temperatures.

Coral Davenport, energy and environment correspondent at The New York Times, talks about the new UN report on climate change, which issued dire warnings about the consequences of a warming planet, and the unprecedented scale of what would have to be done to change the course.