Across
- 1. the process of water or soil becoming acidic
- 4. federal law that regulates air emissions
- 6. loss of electrons, usually involving oxygen
- 8. acid rain breaks down this and marble
- 11. colorless, pungent toxic gas mainly released by burning fuel
- 12. chemical or substance that has adverse effects and contaminates resources
Down
- 2. accelerated deterioration of materials derived from acid rain
- 3. Any form of precipitation with high levels of sulfuric and nitric acids
- 5. highly reactive gases formed during combustion
- 7. air pollution control device that removed hazardous acidic gases
- 9. regulations designed to improve avg fuel mileage
- 10. part of water cycle where water returns to ground