SMOG MASKS RE­LIEVE THE LUNGS

Science Illustrated - - TECHNOLOGY -

In Bei­jing, a smog mask is part of ev­ery­day life, and for a good rea­son. Even an or­di­nary scarf placed in front of the mouth re­duces the num­ber of par­ti­cles in­haled by 28 %. Masks de­signed for cy­clists re­move 55-85 % of all par­ti­cles larger than 0.3 mi­crom­e­ters, but they do not keep gases out. Masks de­signed for work­ing in badly pol­luted en­vi­ron­ments block out more than 95% of par­ti­cle pol­lu­tion.

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