unit

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Across
  1. 2. image
  2. 7. environmental
  3. 9. roof
  4. 10. engineer
  5. 12. share
Down
  1. 1. permeable
  2. 3. runoff
  3. 4. pollutant
  4. 5. pavement
  5. 6. green
  6. 8. build
  7. 11. ask