Now, the most obvious thought anyone who did not believe in global warming would think is that all of these factors have existed for millions of years and the fluctuations in them, such as amounts of greenhouse gases and changes in the surface of the Earth are too small to drastically effect climate. In the long term, that is, say a length of 100,000 years that is probably true. The Earth as a master clockwork will probably naturally adjust to all of man’s device. But mankind may not be around to appreciate the changes as those same changes may exclude mankind from existence.

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