The spot where I am sitting (near Chicago) has been under 100+ feet of glacial ice at least four times in the past - most recently less than 20,000 years ago.

The spot where I am sitting (near Chicago) has been under 100+ feet of glacial ice at least four times in the past - most recently less than 20,000 years ago. As a reasonable thinking person, I see no reason not to expect that to happen again some day. The possibility of another ice age scares me much more than any effects from AGW. Here's what the US and Canada looked like 20,000 years ago: http://faculty.ccc.edu/jtassin/geology201/homework/Chicagogeo/imagesCG/glacxt.gif http://faculty.ccc.edu/jtassin/geology201/homework/Chicagoge...