Where people aren't as deeply reliant on fossil fuel as in the United States, it's far easier for them to imagine change on this scale. When you go to Europe, they're much more ready. They use half the amount of energy per capita that we use. They can imagine using less than that. They see the benefits. They're ready to go.

It drives me crazy to see so much of this planet's life so casually endangered. The first steps are so easy (drive smaller cars, for instance) that it's very hard to understand why we haven't taken them. But I know that this is the issue our generation will be judged by.

My house is covered in solar panels, I'm a great believer in all this - we all should be doing this.

[Kids] will grow up into a world that's difficult and wonderful, and they'll make the best of it they can, and hopefully help turn it in the best possible direction.

Solar power seems to be truly bipartisan in its appeal.

[The Maldives] they've become deeply politically engaged - just for instance, the president taught his whole cabinet to scuba dive so they could hold an underwater cabinet meeting along their dying coral reef and pass a 350 resolution to send to the U.N.

In the last two years 24 countries have set new all-time temperature records. We've seen flooding on an epic scale in every continent .