Across
- 5. Rain that is unusually cidic.
- 6. An Agency of the U.S. federal government whose mission is to protect human environment and health.
- 7. A pollutant made from natural causes.
- 8. by which radiation from the planets atmosphere warms the planets surface.
- 10. In earths lower atmosphere, near ground level, ozone is formed when pollutants caused by cars, power plants, airplanes etc.
Down
- 1. Describes two distinct but related phenomenon observed since the late 70's.
- 2. The degree that tells now pollutant free the air is.
- 3. Carbon Dioxide, Methane, Water, and Nitrous Oxide
- 4. A global increase in the average temperature of the earths atmosphere and ocean.
- 9. Fog or haze combined with smoke and other pollutants.