According to FACE experiments performed in different ecosystems, trees are better able to increase their NPP in response to increasing CO₂ than are grasses, crops, and other herbaceous plants.This suggests that, to counteract the effects of increasing atmospheric CO₂, humans would obtain the most noticeable effects by A) planting more crops. B) planting more forests. C) planting more grasslands. D) adding more fertilizer to crops. E) adding more fertilizer to grasslands.

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The experiments showed that trees are better at increasing their net primary productivity (NPP) in response to increasing CO₂ than grasses and crops. Therefore, planting more forests would be the best choice to counteract the effects of increasing atmospheric CO₂.

According to FACE Experiments Performed in Different Ecosystems, Trees Are