Topography contributes to increased air pollution in East and South Bay valleys

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Topography contributes to increased air pollution in East and South Bay valleys
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The Santa Clara Valley and Livermore Valley typically see higher levels of air pollution than the rest of the Bay Area, according to the Bay Area Air Quality Management District.

Officials came to that conclusion after looking at historical data of the Bay Area's air quality over the past four decades.Harmony Oswald loves hiking at the Santa Teresa County Park in San Jose. One of her favorite things about it is the view.From high above, Harmony has the perfect view of the city and the city's air quality.

"Santa Clara Valley is a valley surrounded by hills and air pollution can get trapped there in the region," said Bay Area Air Quality Management District spokesperson Erin DeMerritt. DeMerritt said higher air pollution has to do with the Santa Clara Valley and Livermore Vlaaey's topography and ozone pollution or smog from a combination of heat, sunlight and vehicle tailpipe emissions. Also, particulate matter can build up to unhealthy levels near the ground, settling into the valleys which can happen when there is a temperature inversion.

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