MSNBC Live with Alex Witt 09/29/13

New report on human impact on climate change

Huffington Post editor Robin Wilkey talks to MSNBC’s Alex Witt about the new report on climate change. Wilkey says that the level of certainty has risen to 95% that humans have had an influence on climate change. She says that the new reports hopes in ... more Duration: {{video.duration.momentjs}}