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One important note: While the respirators exhalation valve makes it easier for the wearer to breathe a good thing when dealing with hazardous air quality it renders the mask useless in preventing COVID transmission, as all of the wearers respiratory droplets are dispersed outside the mask

For the best objective insight on air purifier performance, Cull looks to the Association of Home Appliance Manufacturers Verifide site

That goes double if you use it to ignite a torch or lantern which can offer even more light

Oleander, foxglove, rhododendron, datura, and many common houseplants are dangerously toxic when combusted