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Asked by supriyaa.yn 19th August 2008, 10:33 PM
Answered by Expert
Answer:

there are many methods by which the water gets purified few of them are reverse osmosis and uv light , reverse osmosis removes most of the impurities in the water where as in uv light irradiation micro-organisms like bacterias are killed.

Answered by Expert 20th August 2008, 7:27 AM
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