According to a new report about a third of Americans live in areas where allergies could be made worse by a combination of high ozone levels and ragweed pollen. The top cities with this allergy-inducing combo — dubbed in the report as the "Sneeziest and Wheeziest" cities — include Richmond, Virginia; Memphis, Tennessee; Oklahoma City; Philadelphia; Chattanooga, Tennessee; and Chicago. The Natural Resources Defense Council, an environmental advocacy group based in New York, published the report. The report is one of the first to identify the areas that have both high ozone levels and ragweed pollen. Overall, 109 million Americans live in these areas, the report found. Tthe NRDC says either ozone smog or ragweed pollen by themselves can trigger allergy symptoms and asthma attacks, but people who are exposed to both tend to become more ill than people who are exposed to only one of these triggers. http://bit.ly/1HeCy77 http://bit.ly/1fJ5yqZ This video was produced by Wochit using http://bit.ly/1K3pLYE
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