The overall demand for water in developed nations is rising. But it is not rising as quickly as people had predicted it would. In fact, the rate of water consumption per person per year in developed nations has actually dropped. This means that even though the population has increased and industrial output has grown, the rate at which people withdraw water from reservoirs, rivers, and aquifers has slowed. Which of the following is a likely reason for the drop in per person consumption of water in developed countries?

B. Developed nations have started using water more efficiently than they did in the past.


The best answer is Choice B. Since population and economic activity are increasing faster than water use in the developed nations, the most likely reason is that people have learned to conserve water, meaning they use water more efficiently now.

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