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| The Past is the Key to the Present: Greenhouse and Icehouse Over Time |
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| Written by Professor Ian Plimer |
| Monday, 21 December 2009 06:43 |
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For the Full Report in PDF Form, please click here. [Illustrations, footnotes and references available in PDF version]
For 80% of time, planet Earth has been a warm wet greenhouse planet. Polar icecaps are rare, plants have only be on Earth for 10% of time and 99.99% of all life that has ever existed is extinct. Global atmospheric CO2 and CH4 have been variable over time and have decreased over time whereas O2 has been in the atmosphere for 50% of time, has greatly fluctuated and has increased over time. |
| Last Updated on Monday, 21 December 2009 06:44 |
