I think it's going to be a tough century; I also think people are starting to rise up, and that a growth in human solidarity will help compensate for the loss of margin in the natural world that will make life harder.

The essential thing we need to understand is that the climate crisis is not some future threat, but a very present peril, the biggest one humans have ever encountered. Until we understand that, we'll dawdle.

The technology we need most badly is the technology of community, the knowledge about how to cooperate to get things done.

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

In the United States, cheap fossil fuel has eroded communities. We're the first people with no real practical need for each other. Everything comes from a great distance through anonymous and invisible transactions. We've taken that to be a virtue, but it's as much a curse. Americans are not very satisfied with their lives, and the loss of community is part of that.

All the science in the last few years, or almost all of it, really serves to show that the [climate] effects are larger and more rapid than we had thought even a decade ago.

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.