Supreme Court tests EPA’s limits on mercury air pollution

Aired: 3/25/2015 | 0:06:51 | Clip
The Supreme Court heard arguments over federal pollution mandates. The EPA says its limits on toxic contaminants like mercury in power plant emissions are vital to human health, but energy producers are arguing the EPA didn’t take costs into consideration when the limits were created. Gwen Ifill gets debate from Vickie Patton of the Environmental Defense Fund and David Rivkin of BakerHostetler.