Alone among businesses, the fossil-fuel industry is allowed to dump its main waste, carbon dioxide, for free.

Global warming is no longer a philosophical threat, no longer a future threat, no longer a threat at all. It's our reality.

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.

I guess the underlying principle might be, don't make it too easy for them to stereotype you.

When we think about global warming at all, the arguments tend to be ideological, theological and economic.

We are altering the most basic forces of the planet's surface - the content of the sunlight, the temperature and aridity - and that brings out the most powerful questions about who is in charge. If you wanted to give a name to this theological problem, I think you could say that we are engaged in decreation.

All things considered, the internet seems fairly environmentally benign to me. The last stats I saw showed you could do 1,000 Google searches for the gas it took to drive six-tenths of a mile. But the internet can't substitute for real connection and community.