We're not at the point of trying to stop global warming; it's too late for that. We're trying to keep it from becoming a complete and utter calamity

We'd like to get the fossil fuel industry on the back foot for a while, having to deal with us.

You think OWS is radical? You think 350.org was radical for helping organize mass civil disobedience in D.C. in August against the Keystone Pipeline? We're not radical. Radicals work for oil companies. The CEO of Exxon gets up every morning and goes to work changing the chemical composition of the atmosphere. No one has ever done anything as radical as that, not in all of human history.

One degree turns out to be enough to really unhinge all sorts of earth's ecosystems.

We had other currencies that we could find work in - the currencies of movements: passion, spirit, creativity.

There are many places where we need to fight important battles to make sure that customers have access to solar.

Between [Speaker of the House] Paul Ryan, [Senate Majority Leader] Mitch McConnell, and Donald Trump's team, I don't see a lot of openings for making real progress.