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.

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.

Social movements throughout history take place in people's minds. If we got 5,000 Americans who were talking about climate change to their neighbors and to their coworkers, and talking about this pledge, that would change the political and social landscape so much more than if 5,000 people got arrested for protesting a pipeline.

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.

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.

Online petitions are built around getting as many signatures as possible. But the experience of taking them and forgetting about them degrades the importance.

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.