1. Light pollution make us_______ to see the stars in the sky. (able)

2. Noise is considered as________ pollution. (environment)

3. The soil becomes________ because of the use of so many pesticides and fertilizers. (contaminate)

4._______ waste spills can contaminate groundwater. (industry)

5.________ habitats have been destroyed in recent years. (nature)

6. A number of cleaning products contain ______chemicals. (harm)

7. Water samples collected at these villages were seriously_____ with bacteria. (contaminate)

8. People believe that the _______water has brought cancer to the local residents. (pollute)

9. In many developing countries, water pollution is usually a leading cause of ______. (die)

10._________ elements have been found in both ground and underground water sources. (pollute)

11. Fish and many other animals are killed by_______ in their habitat. (pollute)

12. Astronomers are concerned about light pollution because they have______ in viewing activities in the
sky and outer space. (difficult)