How Climate Change Has Forced US To Change Policy

Can America's national parks remain "unimpaired" forever, with their majestic scenery and wildlife unaltered? Global warming makes that impossible, says Wylie Carr, a climate change specialist at the National Park Service.

How Climate Change Has Forced US To Change Policy
Can America's national parks remain "unimpaired" forever, with their majestic scenery and wildlife unaltered? Global warming makes that impossible, says Wylie Carr, a climate change specialist at the National Park Service.