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Pollutionwatch: do face masks really prevent the ill effects of pollution? | Air pollution | The Guardian
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Amazon.com: AIRPOP Active+ Halo Washable Reusable Smart Face Mask, Air Quality and Breathing Sensor, Inc 4 Filters, 160 Hours Wear, Innovative Breathable Face Covering, Compatible with iOS app, Black and Yellow :
New York to distribute 1 million free N95 masks amid hazardous smoke levels, as mask sales spike on Amazon - MarketWatch
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