Human Impact on the Environment

7. The process in which mined land is restored.
9. The natural process that occurs when certain gases in the atmosphere absorb and re-radiate thermal energy from the Sun.
10. Air pollution that forms from the interaction of chemicals in the air and sunlight.
12. The removal of large areas of forest for human purposes.
13. Precipitation that has a lower pH than that of normal rain.
14. Part of the environment that supplies materialnecessary for the survival of living things.
15. The contamination of air by harmful substances.

1. The process of planting trees to replace trees that have been cut or burned down.
2. An increase in the average temperature of the Earth surface.
3. The development of towns and cities on previously natural areas.
4. A gas in the atmosphere that Earth's outgoing infrared radiation.
5. The careful use of Earth's materials to reduce damage to the environment.
6. The contamination of the environment with substances that are harmful to life.
8. The mix of both solid and liquid particles in the air.
11. Any change in Earth's climate.