Across
- 2. type of pollution that results from several widespread sources that cannot be traced back to a single location
- 3. (AQI) scale that ranks levels of ozone and other air pollutants
- 10. type of pollution that can be identified from a single source
- 12. removal of large areas of forest for human purposes
- 14. the process of restoring land disturbed by mining
- 15. largest number of individuals of a given species that Earth’s resources can support and maintain for a long period of time
- 16. natural process that occurs when certain gases in the atmosphere absorb and reradiate thermal energy from the Sun
- 17. development of desertlike conditions due to human activities and/or climate change
Down
- 1. rain or snow that has a lower pH than that of normal rainwater
- 4. natural source of supply or support
- 5. portion of precipitation that moves over land and eventually reaches streams, rivers, lakes, and oceans
- 6. mix of solid and liquid particles in the air, including smoke, dust, and dirt
- 7. increase in Earth’s average surface temperature
- 8. to throw away
- 9. development of land near a city to build houses and other buildings
- 10. all the members of a species living in a given area
- 11. planting trees to replace trees that have been cut or burned down
- 13. type of air pollution that occurs when nitrogen and carbon compounds, released by the burning of fossil fuels, react in sunlight