Cuyahoga River Fires

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Across
  1. 2. the introduction of toxic/harmful substances into an environment
  2. 5. Famous river in Ohio
  3. 8. the substance that covers around 75% of the Earth
  4. 9. actions that support the protection of the environment
  5. 10. the spark______and started a fire
Down
  1. 1. passed in 1972 to improve America’s waterways
  2. 3. to support the environment, we need to raise_____________
  3. 4. 1969 was the year of the__________
  4. 6. 1868 was the year of the___________
  5. 7. a layer of oil sitting on top of water