Across
- 6. The process by which fertile land becomes desert
- 7. Extracting minerals from the earth
- 9. Contamination of air, water, or soil
- 11. The growth of cities and towns
- 13. A mix of smoke and fog, often found in cities
- 14. Agricultural advancements that increased food production
- 16. Earth's surface not covered by water
- 18. Agricultural practice of growing one crop over a large area
- 19. A liquid essential for life
- 20. The invisible gas we breathe
- 22. Cleaning used water before returning it to the environment
- 23. The management and care of forests
Down
- 1. Raising livestock like cattle and sheep
- 2. The lowering of pH in seas due to CO2 absorption
- 3. The process of removing salt from seawater
- 4. The act of catching fish
- 5. Living things, from bacteria to plants to animals
- 8. The consumption of H2O for various purposes
- 10. The thinning of Earth's protective layer in the atmosphere
- 12. Farming and cultivation of crops and animals
- 15. Resources Materials or substances like minerals, forests, or water that occur in nature
- 17. Actions by people that affect the environment
- 21. Organisms whose genetic material has been altered in labs