淡水资源日益稀少，而畜牧业占全球人类用水量的近十分之一。
Freshwater is becoming increasingly scarce with the livestock sector accounting for nearly one tenth of global human water use.
但是这却表明我们可以通过更加有效的管理来减少农业用水量，如果农民们也能效仿此行，全球景况将会有所改善。
But it does suggest that better management could reduce the amount of water used in farming, and that the world could be better off if farmers did so.
在上一个世纪，全球用水量的增长速率是人口增长率的两倍以上。
Global water use has been growing at more than twice the rate of population growth in the last century.
全球用水量的五分之一取自地下，人类使用的饮用水有一半也来自地下。
Groundwater provides about a fifth of the planet's water needs and half its drinking water.
全球用水量的五分之一取自地下，人类使用的饮用水有一半也来自地下。
Groundwater provides about a fifth of the planet's water needs and half its drinking water.
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