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manufacturing jobs and a higher concentration of jobs in wholesale trade; administrative, support, and waste management; professional, scientific, and technical services; and transportation and warehousing.
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freeway system has made Los Angeles the archetypal auto dependent urban area. The huge number of motor vehicles, combined with the city's valley location, often creates dangerously high smog levels. A
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manufacturing jobs and a higher concentration of jobs in wholesale trade; administrative, support, and waste management; professional, scientific, and technical services; and transportation and warehousing.