1.What is pollution?

2. Effects of fertilizer pollution in water?

3. What is algae bloom?

4. What do fertilizers contain that makes plants and algae grow faster?

5. Explain why plants die when they do not get enough light?

6. Explain why the population of bacteria in water increases after plant die?

7. Explain why fish die when they do not get enough oxygen?

8. What causes pollution?

9. What is air pollution?

10. What is pollution control?

11.What does zero pollution mean?

12. Main causes of water pollution?

13. What are reasons for increase in air pollution?