lightbulbs and sex

Last night the author and environmentalist Bill McKibben got to tell American comedian Stephen Colbert about the 350.org campaign.

McKibben said, 'It's past the point where we can make the math work one lightbulb at a time.'

'It's all over,' said Colbert, 'We should all have end-of-the-world sex.'

McKibben later tweets that he thinks he survived with at least 40% of his dignity intact. Video.