Erosion of farmland, overuse of both surface and groundwater, dwindling supplies of finite fossil fuels, and escalating extinction of plant and animal species imperil the ability of the earth's resources to meet the needs of such enormous numbers of humans. The food situation worldwide is becoming critical
The answer should be C. In ocean trenches
I would go with D, because acid can be reduced by using it less
The answer is: D. elastic rebound hypothesis.