Across
- 2. Light Bulb
- 4. Major
- 7. Rarely
- 10. Overuse
- 12. To waste
- 13. Renewable/reusable
- 14. To recycle
- 17. Organization
- 18. Environment
- 19. Sometimes
- 20. Author
Down
- 1. Never
- 3. Past tense
- 5. Greenhouse effect
- 6. To protect
- 8. Imperfect tense
- 9. To have to do something
- 11. Solar panels
- 15. Resources
- 16. To conserve
