Büyük şehirlerde hava kirlidir.
- The air is polluted in the big cities.
Bu nehir kirli değildir.
- This river is not polluted.
Bazı fabrikalar çevreyi kirletir.
- Some factories pollute the environment.
Kanalizasyon çoğunlukla okyanusu kirletir.
- Sewage often pollutes the ocean.
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.