Across
- 2. the system where plants and animals support one another
- 3. a place where organisms live
- 5. to drop trash on the ground
- 8. a low area that has been filled in
- 10. something that‘s been released or emitted into the world
- 11. the protection and preservation of the natural environment
- 13. unwanted matter or material of any type
Down
- 1. cutting down forests
- 4. the study of how living things relate to the environment
- 6. unwanted, harmful stuff contaminating an environment
- 7. strong, unpleasant and sometimes dangerous gas or smoke
- 9. Placing waste in an area that is not appropriate
- 11. weather that conditions in an particular region
- 12. something you process it, so it can be used again
- 14. air pollution by a mixture of smoke and fog