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-How Much Higher Is Atmospheric CO2 concentration at Mauna Loa

Question 16

Multiple Choice

-How much higher is atmospheric CO<sub>2</sub><sub> </sub>concentration at Mauna Loa Observatory in 2015 than it was in 1960? A) 80% higher B) Twice as high C) Four times higher D) 25% higher
-How much higher is atmospheric CO2 concentration at Mauna Loa Observatory in 2015 than it was in 1960?


A) 80% higher
B) Twice as high
C) Four times higher
D) 25% higher

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