Scientists hold signs during a rally in conjunction with the American Geophysical Union's fall meeting Tuesday, Dec. 13, 2016, in San Francisco. (AP/Marcio Jose Sanchez)

The Resurgence Of Climate Change Denial And Anti-Science

Michael Mann addresses the chilly atmosphere for scientists currently in Washington, DC, and talks about the dire situation the world finds itself on as President Donald Trump rolls back initiatives intended to combat climate change.