1. Soil pollution .............. many bad effects on ecosystems and human life.
A. does B. causes C. makes D. All are correct
2. Many plants and animals die because of ...............
A. noise pollution B. environment C. deforestation C. A and B are correct
3. The air in this city is ............... by emissions from nearby factories.
A. exchanged B. reduced C. polluted D. All are correct