Available at: (last accessed 25 August 2015). United Nations Environment Programme New Centre, 2015. World Health Assembly Passes Landmark Resolution on Air Pollution and Health. Health effects of fine particulate air pollution: Lines that connect. Airborne particulate matter and human health: a review. Compared with cloth masks, disposable surgical masks are more effective in reducing particulate exposure.Дavidson C, Phalen RF, Solomon PA. Standard N95 mask performance was used as a control to compare the results with cloth masks, and our results suggest that cloth masks are only marginally beneficial in protecting individuals from particles<2.5 Ојm. When the cloth masks were tested against lab-generated whole diesel particles, the filtration efficiency for three particle sizes (30, 100, and 500вЂ‰nm) ranged from 15% to 57%. Two styles of commercially available fabric masks were the least effective with a filtration efficiency of 39вЂ“65% for PSL particles, and they performed better as the particle size increased. Among the three cloth mask types, a cloth mask with an exhaust valve performed best with filtration efficiency of 80вЂ“90% for the measured polystyrene latex (PSL) particle sizes. Five monodispersed aerosol sphere size (30, 100, and 500вЂ‰nm, and 1 and 2.5 Ојm) and diluted whole diesel exhaust was used to assess facemask performance. This study examined the efficiency of four types of masks (three types of cloth masks and one type of surgical mask) commonly worn in the developing world. Inexpensive cloth masks are widely used in developing countries to protect from particulate pollution albeit limited data on their efficacy exists.

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