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