Across
- 3. water from washing machine, sinks and showers
- 4. barrier used to prevent the overflow of water
- 5. adaptation in heritable characteristics over successive generations
- 6. cutting only certain trees down at once
- 8. used to control undesired plants
- 9. channel used to transport fresh water to highly populated areas
- 10. underground layer of freshwater
- 11. unit of radioactivity
- 13. atom splits into two smaller atoms
- 15. practice of growing two or more crops in proximity
- 16. long-term weather pattern in a region
- 18. harnesses the kinetic energy of some fluid into energy
- 19. also known as acid rain
- 20. fire set intentionally for forest management
Down
- 1. material that does not allow water to pass through it
- 2. imbalance of essential nutrients
- 7. population shift from rural to urban areas
- 12. process that takes away mineral components from saline water
- 14. combustible black or brownish-black sedimentary rock
- 17. well from which water flows under natural pressure without pumping