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What is the purpose of purification of water or air, do you think it's important or is it mandatory for states capable of it?

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Question added by Deleted user
Date Posted: 2013/08/16
Abderrahim Grine
by Abderrahim Grine , EMPLOIYEUR , COMMUNE DE COLLA

The purpose of purifying water or air is to avoid the disease , and are binding on all states

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