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Why did my county get an “F” for ozone when the neighboring counties got better grades?

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Why did my county get an “F” for ozone when the neighboring counties got better grades?

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Though ozone pollution problems are typically regional in scope, some variation in ozone levels can occur across counties in metropolitan areas. Variations can occur for many reasons, but often it has to do with how ozone is produced. The raw ingredients for ozone –the emissions from cars, trucks, buses, power plant and factories (among other things) – mix in the sunlight and heat and produce ozone, which can show up downwind of the area where the emissions are produced. The county producing the raw ingredients may not be measuring the problem because the ozone it helped create is cooked and deposited downwind. Other factors that can influence these variations in ozone levels include where monitors are located, prevailing winds, and localized climatic conditions. To learn more about sources and trends in pollution in your region of the nation, access “American Lung Association State of the Air: 2004” online at www.lungusa.org. You can type in your zip code and get information on your c

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