During the industrial revolution and population explosion of the 19th and 20th centuries, the demand for water rose dramatically.
在19世纪和20世纪的工业革命和人口激增期间，人们对水的需求急剧上升。
2
Although population, industrial output and economic productivity have continued to soar in developed nations, the rate at which people withdraw water from aquifers, rivers and lakes has slowed.
尽管发达国家的人口、工业产出和经济生产率还在飙升，但人们从含水层、河流和湖泊取水的速度已经放缓。
3
Long run economic constraints include declining oil production and exports and pressure on water supplies caused by rapid population growth, industrial expansion, and increased water pollution.