While the American people have the impression that scientists are hard at work figuring out this complex matter of climate change, it's not actually that complicated.

Climate change has been associated so much with a peaceful mentality - obviously peace and love are good, but we need to think about climate as a threat to survival.

I argue that I don't think it's a moral position to say that civilization is going to collapse, and that's okay. Because that would cause the deaths of billions of people. It's certainly not something I'm willing to accept.

I used to be a lot more afraid of climate change. Now I spend my time working, planning, trying to move forward.

While the American people have the impression that scientists are hard at work figuring out this complex matter of climate change, it's not actually that complicated.

With climate change, of course there are things to grieve. I certainly grieved that the vision that I had for my life, that I would be a clinical psychologist and write books and have a family, that that was not going to happen, because if the world is collapsing around you, it just doesn't seem that appealing anymore.

My grandmother is a Holocaust survivor. Some heroes of mine have long been the Jewish Partisans, these young people who just went into the woods with whatever guns and bombs and what not they could get their hands on, and just would fight Nazis, and try to help people escape.