Ecology

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Across
  1. 2. when you go from home to work
  2. 4. inexpensive
  3. 8. too much of this in the city
  4. 9. good for your health
  5. 11. can't ride the bus without this
  6. 12. answer to a problem
Down
  1. 1. easy to use and reliable
  2. 3. lots of cars
  3. 4. negative
  4. 5. positive
  5. 6. BRT has separate ones
  6. 7. where you get on the bus
  7. 10. something you write after doing research