| Term | Definition |
|---|
| pollutants | harmful substances in the air, water or soil |
| photochemical smog | a brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence of sunlight |
| acid rain | rain that contains more acid than normal |
| forest fires, soil erosion, dust storms, erupting volcanoes | What are some natural processes that add particles to the atmosphere |
| farming, construction,burning fossil fuels such as coal, oil, gasoline, disel fuel | Human activities producing pollution |
| burning fossil fuels | What is the major source of air pollution today? |
| smog | smoke + fog |
| photo | "light" |
| acid rain | forms when nitrogen oxides and sulfur oxides combine with water in the air to form nitric acid and sulfuric acid. |
| rain, sleet, snow, fog | What carries the 2 acids to the trees and lakes? |
| ozone in the troposphere | What is the main pollutant in photochemical smog? |
| Environmental Protection Agency | What government agency monitors air quality? |
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