"An awesome Earth Day warning" from 40 years ago!

I don't think the word "awesome" had quite the same connotation in 1970. Nonetheless:

At the end of his Earth Day broadcast on NBC News, April 22, 1970, anchorman Frank Blair reported an “awesome Earth Day warning” from climatologist Dr. J. Murray Mitchell who reported that manmade pollution “….could so warm the earth in 200 years as to create a greenhouse effect, melting the Arctic ice cap and flooding vast areas of the world.” See the warning at the end of the clip, here: http://bit.ly/bjWyA7
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