Across
- 1. fuel from plants
- 7. Habitat destruction, Invasive species, Population growth, Pollution, Climate change, Overexploitation
- 8. food shortage
- 9. Pb
- 12. rotary engine
- 14. converting waste
- 15. destroy insects
- 16. maximum amount
- 18. harden lava
- 19. 03
- 22. corroding metal
- 23. surface reflects light
- 24. trees with roots underwater
- 25. low oxygen levels
Down
- 2. eliminated species
- 3. water going down the street
- 4. breaking in 2 parts
- 5. virus
- 6. dryness, sunshine, wind, rain, etc.
- 10. catching extra fish
- 11. weather
- 13. wind blowing sand around
- 16. the process of burning something
- 17. water drains off
- 20. light pollution
- 21. black or brown sediment rock
