Ozone pollution is one of many types of air pollution, and ozone is one of the most common pollutants in urban and suburban areas. Ozone pollution comes mainly from power plants and vehicle exhaust, and is a major contributor to smog in heavily populated areas. However, it’s important not to confuse this “bad ozone” with the “good ozone” which occurs naturally in the upper atmosphere. Good ozone is what protects us from the sun’s ultraviolet rays, and is a natural part of the atmosphere. Closer to the ground, however, ozone does not occur naturally and is a pollutant when added to the air by human activities. Like many compounds in nature, whether ozone is “good” or “bad” depends on how much of it there is, and where in the atmosphere it is located.
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