Nearly everyone breathes bad air. This is what you can do to lower your riskMost of the world's population is exposed to polluted air and or those living in cities with chronically bad air, the smog might feel inescapable1 hour ago

Nearly everyone breathes bad air. This is what you can do to lower your riskMost of the world's population is exposed to polluted air and or those living in cities with chronically bad air, the smog might feel inescapable1 hour ago

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