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What is the percent increase of CO2 in 1.00 m3 of air between 1880 and 2014? Express the percent increase to three significant figures.
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3 pm in 1.0o mi 1880 0as 2.9o It has increased to 4oo ppm im 20 m crease (400-290) x- loo 2.90 -37-331

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