9. Complete the sentences, using the correct form of the words in brackets.
1. People believe that the water has brought cancer to the local residents. (pollute)
2. Light pollution make us to see the stars in the sky. (able)
3. Noise is considered as pollution. (environment)
4. habitats have been destroyed in recent years.(nature)
5. A number of cleaning products contain chemicals.(harm)
6. Water samples collected at these villages were seriously withbacteria. (contaminate)
7. An of agrochemicals is pesticides.(illustrate)
8. Contaminants are usually to aquatic plants.(poison)