Across
- 2. Overuse of underground water supplies.
- 4. Farming of fish or shellfish.
- 5. Salt buildup in soil that reduces fertility.
- 8. Chemical used to kill pests.
- 9. Crops or animals altered using DNA technology (abbr: GMOs).
- 11. Mid-20th century farming boom with high-yield crops and chemicals.
- 14. Chemical used to kill weeds.
- 16. Chickens, turkeys, and ducks raised for meat or eggs.
- 18. Chemicals that kill bugs or fungi.
- 19. Animals like cows and sheep that chew cud.
- 20. Farm animals raised for food, fiber, or labor.
- 21. Artificial watering of crops.
- 22. The practice of growing crops and raising animals.
Down
- 1. Planting only one crop in a field, year after year.
- 3. Excess nutrients from humans causing algal blooms.
- 6. Productive land turning into desert.
- 7. Soil suitable for growing crops.
- 10. Wearing away of soil by wind or water.
- 12. Taming plants or animals for human use.
- 13. Build-up of toxins in organisms over time.
- 15. Water that flows over land, carrying pollutants.
- 17. Nutrient source added to soil to boost plant growth.