The '''controversy over the science of [[global warming]]''' is mainly over the extent of [[human]] contribution to warming, as well as a dispute over predictions of near-future warming and its effect on human beings and the environment.
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Among registered U.S. voters, opinion is split down the middle, with 75% of Democrats believing that "the science is settled" in favor of the view of the [[IPCC]], and 73% of Republicans believing that there is no scientific proof. Both main party candidates for president in the 2008 election, [[John McCain]] and [[Barack Obama]], have stated publicly that the issue is real and urgent.
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The Stern Review<ref>[http://www.hm-treasury.gov.uk/newsroom_and_speeches/press/2006/press_stern_06.cfm
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Stern Review on the economics of climate change]</ref>, commissioned by the UK Government to look into the economic effects of climate change, concluded that if left unchecked climate change would cost 5% of GDP per year. "In contrast, the costs of action to reduce greenhouse gas emissions to avoid the worst impacts of climate change can be limited to around 1% of global GDP each year."
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==Links==
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*[http://people-press.org/reports/display.php3?ReportID=303 Global Warming: A Divide on Causes and Solutions] - public opinion poll by Pew Research Center
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*[http://epw.senate.gov/public/index.cfm?FuseAction=Minority.SenateReport#report Senate Minority Report] lists four hundred (400) scientists who disagree with the current state of climate alarmism