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In large part, the answer lies in the development and large-scale application of relatively simple technologies.

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However, two biggest components of the global water shortage are the pollution of drinking supplies with human waste, and the huge waste of water that is mainly in some agricultural practices.

The world’s environmental situation might be eased if we carefully deal with our waste.

Meanwhile, water used for agriculture accounts for more than two thirds of human’s use of water.

By using “micro-irrigation”, in which water is piped and fed onto crops through sealed systems, irrigation can be made 90% efficient.