Across
- 2. federal agency that regulates pollution
- 4. mixture of smoke and fog
- 5. harmful precipitation
- 9. destruction of the upper atmosphere
- 10. volcanic ash and forest fire debris are examples
Down
- 1. solar radiation trapped in the atmosphere
- 3. absorb solar radiation in the atmosphere
- 6. how clean the atmosphere is
- 7. caused by pollutants near the ground
- 8. worldwide rise in temperature