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Refer to the Graph, Showing Changes in Atmospheric CO2 Concentrations

Question 159

Multiple Choice

Refer to the graph, showing changes in atmospheric CO2 concentrations in the Northern Hemisphere from 1960 to 2015. Refer to the graph, showing changes in atmospheric CO<sub>2</sub> concentrations in the Northern Hemisphere from 1960 to 2015. The data indicate that the overall CO<sub>2</sub> concentration is _______, with yearly fluctuations due to _______. A) variable; precipitation B) increasing; ocean absorption C) increasing; photosynthesis D) decreasing; precipitation E) decreasing; photosynthesis The data indicate that the overall CO2 concentration is _______, with yearly fluctuations due to _______.


A) variable; precipitation
B) increasing; ocean absorption
C) increasing; photosynthesis
D) decreasing; precipitation
E) decreasing; photosynthesis

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