=>
II/
6.  untreated
7. poisoning 
8. environmental
9. contaminated
10. radiation

III/
11. I would protect our environment.
12. I will have some problems with my ear.
13. I will tell them the bad effects of littering.
14. People could die.
15. They will die.

III/
16. I am a member of the anti-pollution program in my school, so I often go to school by bus.
17. The trees in this area were cleared off because of the construction of public facilities.
18. Fresh,clean water is very important to life since no one can live long without it.
19. Because Kim never cleans her room, her mother is complaining.
20. Many aquatic animals are dead due to the polluted water.

V/
31. If you don't exercise more, you can't have a good health.
32. Too many telephone poles, advertising billboards, or shop signs may cause visual pollution.
33. If we don't take action immediately, the air will become completely polluted.
34. Both weeds and aquatic plants die because of herbicides.
35. If many people respected the environment, it would not be in danger now.
36. Since the water is contaminated, people get more diseases.
37. Because of breathing in unclear air, my uncle suffered from lung cancer.
38. The street will look attractive if people stop throwing rubbish in the street.
39. Due to the heavy rain, the road in front of my house was flooded.
40. Light pollution may result from too much use of electric lights.