Which one of the following ranges of percentage of increase of CO2in the atmosphere since 1750is correct
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Answer: As ofDecember 2008, the concentration of CO2 in Earth's atmosphere was about 386 parts per million (ppm), with a steady recent growth rate of about 2 ppm per year. Current atmospheric concentrations of CO2 are about 30% higher than they were about 150 years ago at the dawn of the industrial revolution.
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