Pollution

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Across
  1. 1. Bogs formed over thousands of years in marshy areas, used as a fuel.
  2. 3. Minerals washed into rivers from fertilizers.
  3. 5. A gas produced from cattle and swamps of paddy (rice) fields.
  4. 6. Crops sprayed with this to prevent insects.
  5. 9. Method used in the large scale removal of trees.
  6. 10. The Human...........is increasing dramically.
  7. 11. Number of species present in an environment.
  8. 13. Large scale removal of trees.
  9. 14. Better .........methods mean we have more food.
Down
  1. 1. Humans have no natural............
  2. 2. Crops sprayed with this to prevent 'weeds'.
  3. 4. Precipitaion that has its pH altered due to polluant gases.
  4. 7. Process when a lake/river becomes 'dead' due lack of Oxygen caused by algal bloom.
  5. 8. ..........dioxide air polluting gases.
  6. 12. Bodily waste & waste water from homes.