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.
Kanalizasyon çoğunlukla okyanusu kirletir.
- Sewage often pollutes the ocean.
Fabrikalardan gelen gazlar havayı kirletir.
- Exhaust from factories pollutes the air.
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.