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

There are a lot of reasons people don't talk about climate change. One of them has to do with the language of science, and people feeling not competent about this issue.

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.

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.

Climate change is the sine qua non of continued civilization. We either solve this, or it's lights out. Turning into a collective like that is so much more aligned with how humans live and think and change.

It is rarely comfortable to talk about climate change. Bringing something difficult up, it feels like somehow by mentioning this I'm kind of causing it, I'm hurting these people. But you're not hurting these people; climate change is hurting these people. You're telling them they're being hurt.

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.