Based on the merit of foam, a new drilling method is put forward, that is the foam drilling technique of deep well applied in drought and scarce water areas.

依据泡沫的优点，提出了在干旱缺水地区采用深水井泡沫钻进技术的钻探新方法。

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Even if the rise in output comes about but in the "wrong" way, there could be problems, since water in some areas is growing scarce and increasing food output will make it scarcer.

如果采用不恰当的方式，那么即使粮食产量增长，也会问题多多，因为某些地区的水源已经越来越稀少，而提高粮食产量会使其更稀少。

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They stay put in areas where housing is substandard, safe water and sanitation are scarce, environments are filthy, and disease-carrying insects and animals are abundant.

它们滞留在住房条件差、安全用水和卫生设施稀缺、环境肮脏以及带病昆虫和动物大量繁衍的地方。

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This treatment and reuse approach has the additional benefit of requiring much less water in those areas where water is a scarce resource.

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The new process has obvious appeal in coastal areas where fresh water is scarce such as the Persian Gulf.

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The expansion of copper and gold mining in Chile and Peru has mainly occurred in arid areas and has led to competition for scarce water with both export agriculture and the needs of the indigenous population.

UNESCO: Urbanization, globalisation and climate change are creating new challenges to water management in the region of Latin America and the Caribbean. | United Nations Educational, Scientific and Cultural Organization