1. -.. habitats have been destroyed in recent year ( NATURE ) 2. A number of cleaning products contain — chemicals ( HARM ) 3. Water samples

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 )