Drop in world temperatures fuels global warming debate

Official government measurements show that the world's temperature has cooled a bit since reaching its most recent peak in 1998. That's given global warming skeptics new ammunition to attack the prevailing theory of climate change. The skeptics argue that the current stretch of slightly cooler temperatures means that costly measures to limit carbon dioxide emissions are ill-founded and unnecessary. Proposals to combat global warming are "crazy" and will "destroy more than a million good American jobs and increase the average family's annual energy bill by at least $1,500 a year," the Heartland Institute, a conservative research organization based in Chicago, declared in full-page newspaper ads earlier this summer. "High levels of carbon dioxide actually benefit wildlife and human health," the ads asserted.