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  • Experts: CO2 record illustrates 'scary' trendadd to reading list  

    Posted on May 11, 2013 at 4:05 PM

    Updated Sunday, May 12 at 11:12 AM

    WASHINGTON (AP) — The old saying that "what goes up must come down" doesn't apply to carbon dioxide pollution in the air, which just hit an unnerving milestone.