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1) The two sources of water are: surface water and ground water.
surface water is found in Lakes, rivers and reservoirs.
ground water lies under the surface of land, where it travels through and fills opening in the rocks.
2) one major need of water purification is to provide clean drinking water. water purification also meets the need of medical, pharmacological, chemical and industrial applications for clean and portable water.
3) boiling, filtration, distillation and chlorination.
boiling is the cheapest and safest form of water purification.
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