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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: RetiredNow who wrote (320033)	1/11/2007 4:15:18 PM
From: tejek	Read Replies (1) \| Respond to of 1576308

Actually, they have measured these cycles as far back as 800 thousand years. The CO2 levels have always been within 3 sigma of the mean, which means that 99% of the time they have fallen within a defined range. As CO2 levels increase, the earth warmed. Then the earth biosystem absorbed the CO2 and the earth cooled. Thus, predictable cycles developed that were well within the tolerance ranges of most species inhabiting the earth. In the last 50 years, something changed. First, the CO2 levels exceeded the upper limit (mean plus 3 sigma) and has stayed above that upper limit and continue to accelerate upwards. Second, the rate of acceleration in CO2 levels has been faster than any time in the last 800 thousand years. Statisticians and folks who use the scientific method will tell you that this means the last 50 years of data do not represent a one time event (or outlier), but the sustained nature above the upper limit means that a systemic change has occurred. Most reputable scientists not funded by oil companies will tell you that the systemic change has been human industrialization and the increased use of fossil fuels in the last 50-100 years. This change in the CO2 mean has been discussed over and over again. The Bush Republicans simply refuse to get it.