In a speech at the University of Oregon, James Hansen, NASA’s chief atmospheric scientist, walks listeners thru the most recent geologic periods, and speaks to the commonly heard climate canard, “It’s been hotter in earth’s history before – so what’s the big deal?’

this presentation and others by Hansen available here:
http://www.columbia.edu/~jeh1/present…

James Hansen’s original video of this lecture can be accessed here:
http://www.youtube.com/watch?v=pgC8yZ…


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