Film 'This Changes Everything' is not a sad story. It's not a slit-your-wrists climate film. It's a story about people who are making change happen.

Find an organization, shoot them an email, call them up, find them on Facebook and say "Hey, I want to volunteer." And that first step could lead to a whole life of engagement. It could be a pretty exciting ride.

I'm really changed by my research. This book ["This Changes Everything" ]is very different from what I set out to write.

I've always kind of hated films about climate change.

I think that kind of urgency is what makes this stage of the climate movement really different from what it was even a few years ago when it was much more of the professionalized NGOs lobbying behind closed doors and maybe having a march now and then.

If you have a culture based on hunting and fishing and all the animals are disappearing and the fish are sick, then you can't live traditionally. Then your treaty is being violated. Obviously there are degrees of choice in terms of that decision to fight.

The United States had eight years of Barack Obama. He made it incredibly clear that he was a right-wing Democrat. He cited Ronald Reagan lovingly in every stump speech for the last six months of the presidential 2008 campaign. And he made it clear that he was going to be a business-friendly Democratic president, and that he was not going to rock the neoliberal boat. And he didn't.