When we work all over the planet, it's mostly poor and black and brown and young people, because that's mostly what the world [environmentalism] is.

My guess is that liberating the fossil fuel industry to frack anywhere they want will drive down the rate at which we're converting to sun and wind. And it's entirely a rate problem at this point.

Ice in the West Antarctic and over Greenland, i.e., ice that's over a rock at the moment, that will raise the level of the sea as it slides into the ocean, putting at risk everyone and everything that lives on the coasts, and that includes an enormous percentage of the world's people.

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

One of my favorite places is the Maldives, an all-Muslim nation in the Indian Ocean with a culture that stretches back 5,000 years. But since the highest point in the archipelago is a meter or two above sea level, even the next hundred are not guaranteed. They've committed to becoming the first carbon-neutral nation on Earth by 2020, building windmills as fast as they can.

TV makes it so easy to postpone living for another half hour.

My goal was to have as many of the primary sources as I could made available for people to look at and understand. Climate change is probably the most important thing that's ever happened, and yet people's understanding of it and its history remains a little fuzzy.