Across
- 7. infrequent, scarce animal or bird
- 9. polluted rain
- 11. fuel from the ground, like coal or oil
- 15. an organic fertilizer
- 16. a charitable contribution
- 18. a protected area for wildlife
- 19. disappearance of species
- 20. the act of making objects reusable
- 21. a person doing unpaid charity work
Down
- 1. protection from extinction
- 2. designed to be thrown away after usage
- 3. a species living in the sea
- 4. congestion of vehicles
- 5. an open site for disposing of waste material
- 6. how much an individual pollutes the environment with their greenhouse gases
- 7. sustainable
- 8. gases released by vehicles when the engine is running
- 10. the rising and overflowing of water
- 12. drinking water from the valve controlling the release of water
- 13. a temporary shortage of rainfall
- 14. a water barrier
- 17. a chemical for killing insects which destroy crops
- 22. rubbish