http://green.yahoo.com/global-warming/ed-14/global-warming-myths-and-facts.html
Myth: The science of global warming is too uncertain to act on.
Myth: Even if global warming is a problem, addressing it will hurt American industry and workers.
Myth: Water vapor is the most important, abundant greenhouse gas. So if we’re going to control a greenhouse gas, why don’t we control it instead of carbon dioxide (CO2)?
Myth: Global warming and extra CO2 will actually be beneficial — they reduce cold-related deaths and stimulate crop growth.
Myth: Global warming is just part of a natural cycle. The Arctic has warmed up in the past.
All these answered on that link.
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