Environmental Problems

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Across
  1. 4. increasing business, cultural & other contacts between countries
  2. 6. rain which contains harmful chemicals as a result of burning substances such as oil and coal
  3. 8. destroying forest in a tropical area which receives a lot of rain
  4. 9. air pollution found in cities caused by a mixture of smoke, gases and chemicals (the word has been formed from smoke+ fog)
  5. 10. substance in a form that is neither solid nor liquid
  6. 12. not existing any longer
  7. 14. ice covering the areas at the North and South Poles
Down
  1. 1. reduction in the ozone layer
  2. 2. rise in the world's temperature
  3. 3. dangerous
  4. 5. damage caused to the air by harmful substances or waste
  5. 7. very few in number, at risk of becoming extinct
  6. 11. the mixture of gases around the Earth
  7. 13. types