Camille Parmesan - We're definitely seeing species going extinct because of climate change....

We're definitely seeing species going extinct because of climate change. We're going to lose the penguins. We're going to lose the polar bears, no question.... I'm seeing high mountain butterflies literally being pushed off the mountains. This is happening. It is not theory. It is not people saying, 'Oh, we think it might happen.' It is happening, and it is incredibly depressing.