Bu nehir kirli değildir.
- This river is not polluted.
O, dünyadaki en kirli şehirlerden biridir.
- It's one of the most polluted cities in the world.
Bazı fabrikalar çevreyi kirletir.
- Some factories pollute the environment.
Okyanusun büyük alanları kirletildi.
- Large areas of the ocean are polluted.
The factory polluted the river when it cleaned its tanks.
The lights from the stadium polluted the night sky, and we couldn't see the stars.