I think 99% of climate scientists would agree that we need to reduce emissions as quickly as possible, and then begin removing greenhouse gasses and carbon from the air. And if we don't do that we are looking at some range of catastrophe.

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.

I think it's very important to invite and encourage people to talk about climate change who have a lay understanding. In general, there is a lot of confusion among climate activists about the role of science, that scientists should be social and political leaders of this movement.

I think 99% of climate scientists would agree that we need to reduce emissions as quickly as possible, and then begin removing greenhouse gasses and carbon from the air. And if we don't do that we are looking at some range of catastrophe.

Psychologically speaking, the rational, healthy response to climate change is to say to oneself, "What can I do about this?" But that question is often answered through individual action.

Taking fear seriously is not easy. A lot of people's response to fear is "Don't worry so much, it's crazy." But some things absolutely deserve our fear, and climate change is first among them.

By looking the other way on climate change we facilitate a collective denial, and we do it for each other.