Across
- 3. can hurt you
- 5. a person or factory that makes environment dirty
- 7. make something smaller or less
- 9. make the environment dirty
- 10. use something again instead throwing it away
- 11. change long-term changes in the weather
- 12. plants and animals living in nature
- 13. from solid to liquid
- 14. the study how living being interact together
Down
- 1. keep something safe from har
- 2. turn old materialsinto something new
- 4. related to protecting nature
- 6. too many people in one place
- 8. dirty air, land or water caused by humans