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

Very few people on earth ever get to say: 'I am doing, right now, the most important thing I could possibly be doing.' If you'll join this fight that's what you'll get to say

Irene's got a middle name, and it's Global Warming.

For the first time in 150 years, the USDA reported there were more farms in America, not fewer. That has to make you happy.

We spend probably more of our time than we should, just because it's close to home, worrying about the West. But it's equally important to figure out how we're going to free up the resources to let the developing world leapfrog the fossil fuel age. That's at least as mathematically important, and at least as morally crucial.

We have to transition to new technologies, making it more expensive to continue with the old and polluting technologies and cheaper to go to the clean ones.

There is a tendency at every important but difficult crossroad to pretend that it's not really there.