Across
- 3. Glass bottle
- 4. Natural resources
- 5. Ecology
- 6. Global warming
- 8. Government
- 10. Law
- 11. Solution
- 15. Climate change
- 18. Extinction
- 20. Factory
- 22. Air pollution
- 24. Trash
- 25. Plastic container
Down
- 1. Water pollution
- 2. Pure
- 5. Solar energy
- 7. Conservation
- 9. Nuclear energy
- 12. Overpopulation
- 13. Deforestation
- 14. Danger
- 16. Aluminum can
- 17. Cardboard
- 19. Recycling
- 21. Renewable
- 23. Ecotourism
