Civil and Environmental Engineering 2217A/B Study Guide - Final Guide: Treaty, Chlorine, Low-Carbon Economy
3 Apr 2017
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Atmosphere: ionosphere, > 90km, mesosphere, 50-90km, stratosphere (ozone layer), 18-50km, tropopause, 14-18km, troposphere (humans breathe), 0-14km. Air pollutants any substance in the air that can harm humans or the environment: form: solid particles, liquid droplets, gases, sources: Anthropogenic: factories, cars, dry cleaners, power plants, etc. Natural: volcanoes, fires, dust storms, plants (emit vocs with photosynthesis: main classification: Primary: add directly to atmosphere from a given process, identifiable source. Secondary: form in air from chemical reactions, more severe impact on human health and the environment. Natural: atmospheric oxidation of methane, forest fires. 90% of all co from natural sources. Anthropogenic: incomplete combustion of fuels containing carbon, human- caused forest fires. Localized with periods of high emission rates (e. g. rush hour toronto: effects: Vegetation: ability to fix nitrogen slightly affected. Humans and animals: co + fe combine in hemoglobin in blood, prevent oxygen from bonding with hemoglobin, decrease oxygen supply to cells: reduction:
