farming problems in China

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Across
  1. 2. people moving from rural to urban area
  2. 6. loss of crops in a farm
  3. 9. long period without rain or rain is much lower than normal
  4. 12. topsoil removed by wind and water
  5. 13. increasing proportion of old people
Down
  1. 1. relating to a town or city
  2. 3. amount of crops that can be grown on the land
  3. 4. growing too many crops
  4. 5. spread of desert to its surrounding area
  5. 7. too much water covering land after heavy rain
  6. 8. harmful substance in the environment
  7. 10. insects that eat crops
  8. 11. rain that is acid