Across
- 3. Relating to the sun; a type of energy
- 4. Abbreviation for environmental class at WHS
- 6. Production of gas or radiation
- 9. A branch of science relating to life
- 11. Place to dispose of waste
- 12. To maintain in original state
- 13. To contaminate
- 15. Natural home of an animal or plant
- 17. Vanished or no longer living
- 18. Toxic gas
Down
- 1. A club offered at WHS relating to Earth
- 2. Relating to living matter
- 5. To reuse
- 7. Decayed material used as plant fertilizer
- 8. Energy not depleted by use like water
- 10. Surroundings in which we live
- 14. Trash in a public place
- 16. Envelope of gases surrounding the Earth