1. If people breath contaminated air, they will have breathing problems.

2. Many people in this area have cholera because they drink untreated water.

3. The street doesn’t look attractive because there’s a lot of rubbish.

4. If i were you, i would take these bottles to the bottle tank

5. If people don't care the environment, they won't try to save it

6. The river wouldn't be so polluted if factories didn't dump waste in it

7. We will be less worried if oil spolls don't have suck destructive effects

8. If we destroy the ozone layer, what will save us from the UV rays ? 

9. Will we happy if air pollution in the world is a better place? 

10.  If there was/were no more pollution, would the world be a better place?  

1. If people breath contaminated air, they will have breathing problems.

GT : If + S V(s/es), S will V

2. Many people in this area have cholera because they drink untreated water.

GT : Nhiều người ở khu vực này bị bênh tả vì uống nước chưa qua xử lý.

3. The street doesn’t look attractive because there’s a lot of rubbish.

GT : S(số ít) + động từ số ít

4. If I were you, I would take these bottles to the bottle bank. 

5. If people don't really care about the environment, they won't try to save it.     

6. The river won't be so polluted if factories don't dump watse it.        

7.  We wouldn't less worried if oil spills didn't have such destructive effects.

8.  If we destroys the ozone layer, what will save us from the UV rays. 

9. What would happen if water pollution stopped?   

10. Will we happy if air pollution in the world is a better place?