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Concentrations of CO2 higher than in last 650,000 years

Ice Core Extends Climate Record Back 650,000 Years
David Biello, SCIENCE NEWS
November 28, 2005
Researchers have recovered a nearly two-mile-long cylinder of ice from eastern Antarctica that contains a record of atmospheric concentrations of carbon dioxide (CO2) and methane--two potent and ubiquitous greenhouse gases--spanning the last two glacial periods. Analysis of this core shows that current atmospheric concentrations of CO2--380 parts per million (ppm)--are 27 percent higher than the highest levels found in the last 650,000 years. (....)

But this cold, gray ice already makes clear that humans have steered the atmosphere into unusual territory.
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  • edited January 1970
    I don't think anyone really needs proof like this.

    I am just ashamed to be called Australian when our government refuses to honour Kyoto protocols.
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