It's people

123456789101112131415
Across
  1. 2. total value of goods
  2. 4. making an area more urban
  3. 6. using up a resource
  4. 7. social activities to a region
  5. 9. relating characteristic of countryside
  6. 11. relating characteristic of a city
  7. 12. for each person
  8. 13. science or practice of farming
  9. 14. average period of people to live for
  10. 15. age of people
Down
  1. 1. measurement of population per unit
  2. 3. buildings,roads and power supplies
  3. 5. united states
  4. 8. seeking to be more advance
  5. 10. different arts and holidays