"Like most people, Bill (environmentalist and co-founder of 350.org), is not an activist by nature. There's really not that many people whose greatest desire it to go out and fight the system. His theory of change was that he'll write his book, people will read it and they'll change. But that's not how change happens. What is required is to make a little noise, be a little uncomfortable, and push other people to be a little uncomfortable. The moment has come where we have to take a real stance, because we're reaching limits.

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The biggest limit that we're running into may be that we're running out of atmosphere into which to put the waste products of our society, particularly the carbon dioxide that is the ubiquitous byproduct of burning fossil fuels. We burn coal, or oil, or gas, we get CO2 and the atmosphere is now filling up with it..."