1. What is the water?
2. Why is the river water heavily contaminated?
3.How many types of pollution?
4. What would you do if you were the president?
5. Where are most of the plastic waste end up?
6. What are the common effect of exposure to…?
7. Where is more polluted than Danang?
8. How often is garbage collected in your neighborhood?
9. Who is responsible for….?
10. What can land pollution be prevented?