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Some remarks on atmospheric levels of carbon dioxide (Andrew Kenny) South Africa
09.Aug.2017
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Andrew Kenny, physicist and mechanical engineer: This article discusses CO2 levels and global temperatures over the last 550 million years, roughly the period of multi-celled life. CO2 has averaged about 2,000 ppm over this time but with huge fluctuations. Temperatures by contrast have been remarkably steady except for three periods of cold (when there was ice at the poles) and a period of semi cold.

Read 470 times Last modified on Friday, 11 August 2017 01:58

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