For those of us who worry more about working people than about windfall profits for oil companies, it may net out. A better question is: what does it do to our economy if we manage to overheat the earth? This summer's drought provides a small taste.

We use the web to help people organize in the flesh, and then we take the images of those events and put them back on the web to make them add up to more than the sum of their parts.

I imagine a certain amount of consumer impulse will be replaced by community connection. You can already see it starting with things like the local food movement.

We have built a greenhouse, a human greenhouse, where once there bloomed a sweet and wild garden.

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 .

I think we need to think of lots of ways to communicate. And we tried some at 350. We organised what they called the largest art project in the planet's history. We do a lot with art and music and things.

[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.