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[quote user="BaltACD"]The Earth has fluctuated between Snowball Earth and Tropical Earth on numerous occasions in the past 4.5 Billion years - all without the help of mankind. I feel it is supreme human arrogance to feel that human activity is the only cause of 'climate change'. [/quote] I don't know anybody saying the whole warming is man made but part of it for sure. There always has been temperature change in the earth's history. It is the speed of the current temperature rise that indicates that part of it is man made. In the our history the temperature rise was about 4° to 5° in 10.000 years between glacial and interglacial periods, without any measures against global warning the same rise might occur in the next 100 years. In the time from 1906 to 2005 there was a rise of about 0.8°, two third of it in the time from 1956 to 2005. Regards, Volker
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