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