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Not only do they send the readings directly to your phone, but they also track it and give your historical data

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Frank Lyga, who has investigated PCP for more than 16 years

Over time, those particles get trapped in the lung tissue and turn it gray, dark brown, or even almost black in some areas

5 High exposure to these toxins through repeated inhalation of cigarette smoke increases the risk of developing lung cancer

Third Place, Benjamin Rollings, Live Oak at Bon Secour National Wildlife Refuge Honorable Mention, Arthur James Davis, Spiderwort on Dauphin Island Scenic: First Place, Keith Bozeman, Canyon Cascade in Bankhead National Forest