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Calculate the Percent Increase in CO₂between 1960 (At 320 Ppm)and

Question 17

Multiple Choice

Calculate the percent increase in CO₂between 1960 (at 320 ppm) and 2010 (at 400 ppm) .The best answer is

A) 20%.
B) 25%.
C) 80%.
D) 400%.

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