Inconvenient Kyoto Truths By George F. Will Was life better when a sheet of ice a mile thick covered Chicago? Was it worse when Greenland was so warm that Vikings farmed there? <A HREF="http://www.msnbc.msn.com/id/16960409/site/newsweek/" target="_blank">http://www.msnbc.msn.com/id/16960409/site/newsweek/</A>