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He anticipated he would have to review thousands of documents

The PurpleAir sensor provides regular updates on particulate matter levels, allowing us to create graphs showing the evolution of air quality in the room

One reason why so many Americans keep smoking traditional cigarettes is that public health officials have mostly failed to let them know that nicotine alternatives like e-cigarettes are substantially safer than combustible cigarettes

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Because of severe air pollution, LA residents smoke the equivalent of 193 cigarettes a year by far the most of any U.S