19-03-2015
Biology

contestada

What are the main sources of fresh water used by humans

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Wrenell Wrenell

19-03-2015

During early civilization, the main source of fresh water was from a river. Nowadays, we have reservoirs and lakes to get fresh water.

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kargilreddy12 kargilreddy12

19-03-2015

its only fram the ground water

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