Across
- 3. essential, important
- 6. large, huge
- 8. caused, made happen
- 9. removal of waste
- 12. many, a lot
- 13. shipping, moving
- 14. plant food
- 18. join together
Down
- 1. farms, farming
- 2. everywhere
- 4. growing, adding
- 5. hot water vapor
- 7. moment of change
- 10. factories
- 11. ports, waterfronts
- 15. surround, fence in
- 16. the same
- 17. bringing in, entry