1. ...... habitats have been destroyed in recent year ( NATURE ) 2. A number of cleaning products contain ........ chemicals ( HARM ) 3. Water samples collected at these villages were seriously ....... with bacteria ( CONTAMINATE ) 4. People believe that the ...... water has brought cancer to the local residents ( POLLUTION ) 5. Light pollution make us ....... to see the stars in the sky ( ABLE ) 6. Noise is considered as ...... pollution ( ENVIRONMENT ) 7. The soil becomes ........ because of the use of so many pesticides and fertilizers ( CONTAMINATE ) 8. ....... waste spills can contaminate groundwater ( INDUSTRY ) 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 )