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Climate researchers found a close connection between CO2 and the temperature that existed over the past 800,000 years. Climate theory has it that as atmospheric CO2 concentrations go up it gets warmer and vice versa. So where did the CO2 go when it is not in the atmosphere? Much of the CO2 was hidden in the ocean, which explains its low atmosphere concentration during the last Ice Age 20,000 years ago. [Source: Environmental News Network]
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