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Old 08-05-2008, 09:03 PM
DieselAddict DieselAddict is offline
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Originally Posted by bgkast View Post
All of that data is based on ice cores.

Here is more from NOAA:
Thanks for the link which I have found informative. I have yet to find any contradiction to what I said. Instead I found this:

Greenhouse gases occur naturally in the Earth's atmosphere, but are also being added by human activities. This happens primarily through the burning of fossil fuels, such as coal, oil and natural gas, which releases carbon dioxide to the atmosphere. Over the past century, atmospheric carbon dioxide (as measured from ice cores) has increased due to human activities from 300 to 380 parts per million (ppm), and the average Earth temperature has increased approximately 0.7C (or about 1.3F).

Given what we know about the ability of greenhouse gases to warm the Earth's surface, it is reasonable to expect that as concentrations of greenhouse gases in the atmosphere rise above natural levels, the Earth's surface will become increasingly warm. Many scientists have now concluded that global warming can be explained by a human-caused enhancement of the greenhouse effect.

It is important to remember both that the greenhouse effect occurs naturally, and that it has been intensified by humankind's input of greenhouse gases into the atmosphere.
2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL
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