Is het nu zo dat de uitstoot van CO2 en ander broeikasgassen aanleiding geeft tof klimaatverandering, 55 miljoen jaar geleden was nog veel erger:Scientists: Prehistoric volcanoes heated Earth - CNN.com
WASHINGTON (Reuters) -- Ancient volcanoes may have caused a dramatic warming of the Earth's atmosphere that raised sea temperatures and killed off many marine species, resulting in a "planetary emergency," U.S. and European scientists said Thursday.
The discovery shows the impact of the release of large amounts of greenhouse gases into the atmosphere and may shed light on planetary changes wrought by more recent causes of global warming, the scientists reported in the journal Science.
zie ook: Press TV
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