THE CHEMICAL POLLUTANTS FROM CARS AND FACTORIES MAKE THE AIR, WATER...

2. - DE KIEM TRA CHAT LUONG CUOI NAM 20152016 1
Tiếng Anh DE KIEM TRA CHAT LUONG CUOI NAM 20152016 1

2. The chemical pollutants from cars and factories make the air, water and soil dangerously dirty.