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Heavy smoke from hundreds of Canadian wildfires is drifting south across the border into the U.S., turning overcast skies yellow and brown and threatening the health of those breathing it. The Using a respirator mask during wildfire smoke events Efficacy of masks and face coverings in controlling outward aerosol particle emission from expiratory activities Scientific Reports Community Respirators and Masks Personal Protective Equipment CDC Wildfire smoke harms your lungseven when you can't see it. This #WildfirePreparednessWeek, wear an N95: NIOSH approved Tight seal When outdoors for long periods or smoke ash is present Cloth & What kind of mask protects you from smoke?

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