Source: http://www.youtube.com/watch?v=pbPcjORj4Pw

Exceptional video with renowned British broadcaster and naturalist, Sir David Attenborough. This is a well presented examination of natural factors that can cause global warming. Scientific study in carbon dioxide emissions in natural variability do show that nature itself can cause fluctuations that can affect the global climate. From volcanoes to the sun’s effects on the earth, there has been an historic rise and fall of the global temperature that is now measurable over a span of time that encompasses millennia. These fluctuations have had an overall effect that can explain some of the climate variations. However, the measurements show a drastic change on a well presented graph, with the advent of the elevated CO2 emissions, caused by mankind.

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