For those spouting fraud: http://en.wikipedia.org/wiki/Scientific_opinion_on_climate_change
"National and international science academies and scientific societies have assessed the current scientific opinion, in particular on recent global warming. These assessments have largely followed or endorsed the Intergovernmental Panel on Climate Change (IPCC) position of January 2001 that states:
An increasing body of observations gives a collective picture of a warming world and other changes in the climate system... There is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities.
If you ever care to dig deeper than the mass media and most easily accessible information, you'd find out that the world isn't and hasn't been warming for quite some time.
I don't want to get all preachy, but I do think it's important for people to know a couple things. There are many scientists who get funding to prove the existence of global warming, but there is no such money for disproving it. As a result, many opportunistic people have altered data and left out contrary data. The "Climategate" incident is proof of this, even if they try to spin it as a "shortcut" or "doing it for the good of people to take action against global warming".
Here are a few facts:
The globe constantly goes through heating and cooling cycles, and we are in a cooling cycle right now.
There is no significant change in the polar ice levels, and minor change is not rapidly accelerating.
Water vapor is a much more significant factor in the greenhouse effect than CO2. Compared with the dozens of other greenhouse factors, the man-made increase in CO2 levels is negligible.
Displaying polar bears harmed by global warming shows the need to create emotional response as opposed to a logical argument with real data.
You don't have to take some news anchor's or ex-vice president's word that global warming exists. The real data and websites are out there, find out for yourself that this might be the largest global scam ever (not sarcastic, just melodramatic).