Across
- 4. device installed in industrial smokestacks to remove sulfur and other pollutants formed during combustion of coal
- 5. one type of corrosion
- 6. chemicals in the air, water or soil that cause harm to living things or to the environment
- 8. Compounds that trap heat in Earth's atmosphere
- 10. a metal used to protect a nearby metal that us more reactive
- 12. Acidic materials that are seposited on Earth
- 14. naturally produced acidic gases that mix with water vapour in clouds to form acid precipitation
Down
- 1. process of applying zinc coating to iron or steel to provide a protective barrier between the metal and the environment
- 2. Sometimes referred to as acid rain
- 3. natural process of Earth's waming and cooling intervals
- 7. process that chemically breaks down metal
- 9. Long term trend toward warmer temperatures along with extreme climatic events
- 11. process of adding natural limestone to lake water to neutralize lakes that have been acidified by acid deposition
- 13. Acidic gas that mixes with water vapour in clouds to form acid precipitation