I think [George W.] Bush has done nothing right about global warming.

I think fracking for gas will reduce the incentive to turn to renewables, and I think it will do a lot of other damage across the countryside.

The movers and shakers on our planet, aren't the billionaires and generals, they are the incredible numbers of people around the world filled with love for neighbor and for the earth who are resisting, remaking, restoring, renewing and revitalising.

I also think we need unconventional political action, and I increasingly think that there is a need for people of faith to be able to do the kind of things that people of faith did 40 years ago in the heat of the civil rights revolution. This is a moral issue of every bit as much importance requiring every bit as much sacrifice, courage, and energy as that crisis did.

There's a part of all of us whose impulse is to say, "Let's keep everything the same until I die and then you can do whatever you want afterward." And that's a difficult part.

If it's wrong to wreck the planet, it's wrong to profit from the wreckage.

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