WAMU 88.5 - American University Radio | The Mind Is Our Medium
Now Playing

Earth Scientists Pin Climate Change Squarely On 'Humanity'

The federal government's top climate scientists announced Tuesday that 2012 was really hot — among the top 10 hottest years on record and the hottest ever in the U.S., with rising sea levels, less Arctic sea ice and warmer oceans. And the American Geophysical Union called humanity "the major influence" on global climate change.