I am (slightly) less pessimistic than David Letterman. If, however, it is indeed “too late” as he says, then he has certainly nailed the reason: “We have had no leadership.”

But I’m going to view the glass as one-tenth full and take it as a hopeful sign that somebody relatively mainstream like Letterman would break out of his normally uber-ironic mindset to tell it like it is on global warming.

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