Across
- 2. pollution from one place
- 5. one of earth's major issues
- 7. used as a energy source
- 8. organized facilities
- 9. area with buildings and less greenery
- 10. messes with your nervous system
- 13. affects embryos
- 16. a disease that can spread
- 18. "reliable" agriculture
- 21. a disease with "late symptoms
Down
- 1. growth of urbanization
- 3. area with farms and agriculture
- 4. source pollution pollution coming from no specifc place
- 6. growing crops closely
- 11. something being released into the air
- 12. a whole in the barrier between earth and space
- 14. using a septic tank in farming
- 15. island when heat is only in one area
- 16. watering through a system
- 17. causes cancer
- 19. pollution causes air quality to lower
- 20. taking up an area