That's when the vast consensus of the world's climatologists, brought together by the UN and The Intergovernmental Panel on Climate Change, really announced that this was going on, and since then the accumulation of data and wickedly hot years has served to only congeal that consensus much more firmly.

I think that some of it is electoral - helping candidates that are willing to take dramatic actions, not just to say a few words about how climate change might be a problem.

But tolerance by itself can be a cover for moral laziness.

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

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

You think OWS is radical? You think 350.org was radical for helping organize mass civil disobedience in D.C. in August against the Keystone Pipeline? We're not radical. Radicals work for oil companies. The CEO of Exxon gets up every morning and goes to work changing the chemical composition of the atmosphere. No one has ever done anything as radical as that, not in all of human history.

I think that so far the political and economic power of the fossil fuel industry has trumped all else.