1) does the UAE needs a water filtration system ? a) yes b) no 2) what is a water filtration system a) a system that makes water dirty b) a system that cleans water 3) how we can apply the project (where) a) water b) poor people can use natural water filteration system by using charcoal gravel sand and cotton

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Otomatik olarak kaydedilen geri yüklensin mi: ?