Geography crossword puzzle

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Across
  1. 2. What is a multicultural society with many people from diverse cultural backgrounds called?
  2. 3. What is the term for pollution caused primarily by unnecessary honking?
  3. 5. What is the pollution caused by fuel storage tank leakage into rivers?
  4. 6. What are the advantages of going to a city called?
  5. 7. What is the environment where people live on farms and villages called?
  6. 8. What is the pollution caused by the increased use of LEDs?
  7. 11. What is poor air quality affecting half the world’s urban population called?
  8. 14. What is the term for the increase in the proportion of people living in cities?
  9. 15. What job opportunities are called?
  10. 19. What is the movement of people from rural to urban areas called?
  11. 20. refers to our surroundings and can either be physical or human.
  12. 21. Consist of living and non-living things that are found naturally.
Down
  1. 1. What is a physical area on the Earth’ surface called?
  2. 4. What is the number of people living in a unit area of land called?
  3. 9. What is the state of the environment that has not been influenced by humans?
  4. 10. areas What is an area with dense transport networks and densely packed buildings called
  5. 12. What is the name of a physical area on the earth's surface?
  6. 13. surface runoff caused by melting snow.
  7. 16. What are the disadvantages of going to a city called?
  8. 17. What is a built up area called?
  9. 18. What is the primary source of pollution caused by the use of fuelwood and paraffin for cooking and heating?