IV
1. If the factory weren't located near our village, there wouldn't be air pollution and noise pollution
2. If the local people had fresh water, they wouldn't have to use water from the polluted water river
3. If the soil weren't badly polluted, trees and grasses could grow here
4. If Mr Quang didn't work in a noisy environment, his hearing wouldn't become worse
5. If the air weren't so dirty, I wouldn't sneeze so much
V
1. There are three
2. Air
3. Yes, they are
4. Because they cannot sleep or relax
