Across
- 3. conservation
- 6. hunger
- 8. poverty
- 9. extinction
- 11. ecotourism
- 12. destruction
- 14. consequence
- 15. crisis
- 16. ecosystem
- 19. population
- 21. alternative
Down
- 1. allergy
- 2. overpopulation
- 4. environment
- 5. recycling
- 7. radiation
- 10. danger
- 13. globalwarming
- 17. illness
- 18. cancer
- 20. land