Academic study finds Exxon Mobil misled on climate change

Exxon Mobil has been criticized for allegedly hiding what it knew about climate change. More

Exxon Mobil has been criticized for allegedly hiding what it knew about the perils of climate change. Now researchers from Harvard University have published a study alleging that the oil and gas giant tried to systematically mislead the public about climate change for 40 years. William Brangham learns more from science correspondent Miles O’Brien.

AIR DATE 8/23/17