کد فایل 1229944
قیمت: 59٬000 تومان
In the name of God گردش آب و منابع آبی بیان مساله منابع آب گردش آب در طبیعت 80% of all illness in developing countries is caused by water related diseases. 90% of wastewater in developing countries is discharged directly into rivers and streams without treatment. Water Diseases