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Ordovician period

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  • Pat Neuman
    Quotation: ..., critics have countered, if CO2 truly raises global temperatures, how could an ice age have occurred when a greenhouse effect much greater than
    Message 1 of 1 , Jul 16, 2008
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      Quotation:

      ..., critics have countered, if CO2 truly raises global
      temperatures, how could an ice age have occurred when a greenhouse
      effect much greater than today's was in full swing?

      The answer: This particular ice age didn't begin when CO2 was at its
      peak — it began 10 million years earlier, when CO2 levels were at a
      low.

      "Our results are consistent with the notion that CO2 concentrations
      drive climate."

      January 27, 2005

      STUDY BOLSTERS GREENHOUSE EFFECT THEORY, SOLVES ICE AGE MYSTERY

      http://earthobservatory.nasa.gov/Newsroom/MediaAlerts/2005/2005012718
      272.html
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