Global Warming is caused by man.

Dr. Tim Barnett, of the Scripps Institution of Oceanography in La Jolla, California and his team examined more than seven million observations of temperature, salinity and other variables in the world’s oceans, collected by the US National Oceanic and Atmospheric Administration, and compared the patterns with those that are predicted by computer models of various potential causes of climate change. This study found that not natural variations in the Earth’s climate, solar activity, or volcanic eruptions could explain this new data which was collected in the real world. Models based on man-made greenhouse gas emissions matched this study precisely. Two of these greenhouse models were designed, one in Great Britain and one in the United States, and they matched exactly. Peter Stott from the Met Office in the UK, and his colleagues have also compared the temperatures above land and on the surface of the sea level and have found that the air above land was heating up much quicker than that of the surface of the sea. This is inconsistent with a natural fluctuation because they are usually characterized by a rise in ocean temperature.