history

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Across
  1. 4. harmful substances found in the air
  2. 5. buildup and discharge of lightning in storms
  3. 7. the change in climate due to elavation
  4. 8. number of deaths per 1,000 of a population every year
  5. 9. increase in global temperature
  6. 10. shows the things made or found in an area
  7. 12. slow warming of earths surface due to burning fossil fuels
  8. 14. stop creating so many wastes
  9. 17. the lose or destruction of trees
  10. 18. natures most violent storm
  11. 19. things people use such as crops
Down
  1. 1. shaking or trembling of earth
  2. 2. long period with no water
  3. 3. natures largest storm in pacific ocean
  4. 6. countries with low living and industry standards
  5. 11. number of births per 1,000 of a population every year
  6. 13. natures largest storm in atlantic ocean
  7. 14. rate of cooling due to wind
  8. 15. solids, liquids, or gases that are poisonous
  9. 16. dangerous wastes