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Today is an Ozone Action Day in San Antonio. Metro Health notified the public of the city's seventh Ozone Action Day of the year after the Texas Commission on Environmental Quality issued the alert. Children, the elderly, and people with respiratory problems should spend less time outdoors. Metro Health says people can reduce pollution by gassing up after 6 p.m., avoiding the drive-thru, turning your engine off instead of idling, carpooling or taking the bus, and combining errands.