The Environmental Protection Agency determines greenhouse gases pose a threat to public health and safety. A look at the findings and possible new regulations

Guests

  • Margaret Kriz Hobson Energy and environment correspondent, National Journal
  • David Doniger Policy director of the climate center at the Natural Resources Defense Council
  • Roger Martella Attorney in private practice, former general counsel for EPA during the Bush administration
  • Bill Kovacs Vice president for environmental policy at the U.S. Chamber of Commerce
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