The presentation "Biomass pollution basics" addresses the basics of biomass burning and introduces participants to the concept of incomplete combustion, the wide range of pollutants emitted from wood fires and stoves and typical pollutant concentrations. Two pollutants are of primary interest for both health effects and IAP monitoring: particulate matter (PM) and carbon monoxide (CO). Smaller particles ( and PM1) are likely to be most harmful, as they penetrate deep into the human lung. Larger particles are more likely to get 'filtered' by the upper respiratory tract. Considering available technologies and the relative cost and ease of monitoring, it is recommended that organizations focus on measuring levels of . While the.