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This web site states the following, "Air pollution has been a major topic and cause of concern for the residents of Salt Lake City." We noticed that the web page also said " Known as the inversion, the mountains surrounding Salt Lake City frequently disappear behind a curtain of smog during summer and winter seasons." It also said " The smog is a result of the pollution trapped by the unique topographic feature of the Wasatch area. The Air Quality Index AQI, developed by the Environmental Protection Agency EPA. Also known as particulate matter, carbon monoxide." The header had Salt Lake City as the highest ranking optimized keyword. It is followed by SLC, UT, and Air Pollution which isn't as ranked as highly as Salt Lake City. The next words slcair.communication.utah.edu uses is Inversion. Air Quality was included and might not be viewed by search parsers.