Across
- 4. the month that comes after march
- 7. capable of being renewed
- 10. study of relationships between living organisms
- 12. relating or determined by the sun
- 15. where animals live
- 16. maintain something
- 17. able to be maintained
- 19. convert waste into a reusable material
- 20. get rid of food using dirt
Down
- 1. what is around our earth
- 2. where waste an be disposed of
- 3. contaminate
- 5. derived from living matter
- 6. a colourless toxic gas
- 8. a biological community
- 9. the production and discharge of gas
- 11. protect something environmentally from harm
- 13. not putting trash in the garbage
- 14. things that no longer exist
- 18. turn something old into something new