the mexican j puzzle

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Across
  1. 2. resource works with water
  2. 5. engineering works with structal engineering
  3. 6. works with water
  4. 8. planning works with planning to construct a town
  5. 9. works with fluids
  6. 10. works with construction
  7. 11. works with geophysics
  8. 12. works with constructions
  9. 13. deals with cars
  10. 14. works with electromagnetics
  11. 16. works with ogritcultral
  12. 18. engineering work with fail train tracks
Down
  1. 1. surveying works with casting
  2. 3. applies to physics
  3. 4. design works with lights
  4. 7. energy works with economics
  5. 15. works with old buildings
  6. 17. works with different types of gas