Who or What Caused Global Warming
We are all familiar with Al Gore's movie An Inconvenient Truth which argues that human-caused global warming will result in near-total destruction of the planet . We can excuse him as he is only a politician not a scientist. However, the Union of Concerned Scientists state unequivocally that they can identify the "Human Fingerprint" on global warming. Even the EPA blames global warming on human activity in their web site where the opening paragraph states: According to the National Academy of Sciences, the Earth's surface temperature has risen by about 1 degree Fahrenheit in the past century, with accelerated warming during the past two decades. There is new and stronger evidence that most of the warming over the last 50 years is attributable to human activities.