Across
- 2. Oil and Gas
- 5. Roads,Tunnels,Etc.
- 7. Phones
- 12. Power
- 13. Mp3 Players
- 14. Layouts
- 16. Environmental
- 18. Bottles and juice
- 20. Computers
- 21. Chemical and medication
Down
- 1. Spacecraft
- 3. Electricity
- 4. Tree Harvesting
- 6. Wheelchair
- 8. Cars
- 9. Clean Water
- 10. How it Works
- 11. Air Vent/Vacume vents
- 15. Gas
- 17. Organizing
- 19. Software
