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

Ranking

Estilo visual

Opções

Alterar modelo

Restaurar arquivo salvo automaticamente: ?