NRSC 221 Lecture Notes - Indoor Air Quality, Soil Horizon, Asbestosis
9 Feb 2013
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Document Summary
Recently science realized that indoor air pollution can contain 2-5 times higher concentrations of hazardous pollutants than outdoor air. One reason is because modern buildings are built very air tight to conserve energy but resulted in very little ventilation and contaminated air stays in the buildings and accumulates. As well, most people spend about 90% of our time indoors (e. g. children, elderly, pregnant women and those with chronic illness). It is a fibrous material (group of six different minerals natural minerals) which is separable, long, strong and flexible heating resistant fibers. Used in: building materials, paper products, automobile industry, special packaging and coatings. Can"t be dissolved in water, cannot evaporate into the air, or even break down into elements (it remains solid throughout) therefore, cannot reduce its toxic effects. If it deposited on the soil surface, it remains on the soil surface and cannot move through the soil profile.
