Across
- 4. garbage
- 5. are natural substances such as water.
- 7. Contamination
- 8. free from any dirty marks, pollution, etc.
- 10. relating to the environment
Down
- 1. a large area of land covered with trees and plants.
- 2. place where flowers and other plants are grown
- 3. cut down trees
- 6. surface of the ground in which plants grow.
- 9. usually larger than a village but smaller than a city.