The world is on fire, and I'm doing my best to help steer the firetruck.

I don't spend a huge amount of time fixated on climate denial because I don't think that their objections, though sometimes couched in science, are based in science. I think they're based in ideology. And I don't think there's anything you can do.

To me the analogy [to climate change] is... doctors worry a lot about cholesterol. And if you go to the doctor, and the doctor says "oh, your life would be happier if you ate a different diet and exercised" people pay no attention.

It now appears that the fracturing of that ice is happening much more quickly than people previously thought, apparently at a slow melt.

When we work all over the planet, it's mostly poor and black and brown and young people, because that's mostly what the world [environmentalism] is.

I think that some of it is electoral - helping candidates that are willing to take dramatic actions, not just to say a few words about how climate change might be a problem.

The latest computer modeling I've seen indicates that at mid-century, there might be 150 million people classified as "environmental refugees."