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

Clasament

Stilul vizual

Opţiuni

Comutare șablon

Restaurare activitate salvată automat: ?