Environmentalism, I'd always been told, was just rich white people.

We'll never get there if we let the climate crisis bloom unchecked, so for the moment the key is to organize, organize, organize!

I think that it is impossible to think of a threat to social justice greater than what we are doing to the earth's atmosphere at the moment.

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

When you have solar panels, your electricity gets there for free, no one's figured out how to meter the sun yet. And that's good.

Fossil fuel is very seductive stuff. [John Maynard] Keynes once said that, as far as he could tell, the average standard of living from the beginning of human history to the middle of the eighteenth century had perhaps doubled. Not much had changed, and then we found coal and gas and oil and everything changed. We're reaping the result of that, both ecologically and socially.

The latest computer modeling I've seen indicates that at mid-century, there might be 150 million people classified as "environmental refugees."