Across
- 2. farming practice along hillsides
- 5. moving crops from field to field
- 6. ratio of useful work to energy used
- 10. removal of trees without adequate replanting
- 12. irrigation practice with slow watering
- 14. "not in my back yard"
- 15. smoke and fog
- 16. contamination
- 19. restoring land to original form
Down
- 1. non-linear growth
- 3. O3
- 4. hydraulic fracturing
- 7. energy that includes, solar, hydro, geo
- 8. __________capacity
- 9. light element used in batteries
- 11. H20 below the surface
- 13. control weeds, insects, etc on plants
- 17. radioactive element in nuclear energy production
- 18. precipitation with pH below 5.0