Across
- 3. when air is pollutant free
- 5. A bad ozone that damages human health
- 6. environmental protection agency
- 9. the process by which radiation from a planets atmosphere warms the planets surface
- 10. fog or haze combined with smoke
Down
- 1. the natural environment causes adverse change
- 2. a gradual increase in overall temperature of earths atmosphere
- 4. a gas that contributes to the greenhouse effect
- 7. rainfall that causes environmental harm and is acidic and polluted
- 8. destruction of the upper atmospheric layer the ozone