Environmental Science 1021F/G Lecture Notes - Lecture 1: Tums, Scrubbers, Soil Ph
4 Oct 2017
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Several layers: different temps, pressure, density, and composition, anything above thermosphere is (cid:498)outer space(cid:499, thermosphere, mesosphere, stratosphere (17-50 km, troposphere (0-17 km, more matter near surface of earth due to gravity. Stratosphere: has less vapour & matter, more ozone (ozone layer) Good ozone: keeps uv from reaching earth"s surface (cid:523)o(cid:884)+uv sun=good o(cid:885)(cid:524) Quality of ozone depends on where it is in atmosphere. Troposphere: n (78%), o (21%), water vapour (0-4%), co2 (0. 038%) (greenhouse. Nutrient cycling: nutrients move from soil to atmosphere if certain components are not used up. Bad ozone (ground level ozone: this is not a layer): vocs+nox+sun=bad. Air pollution: chemicals in the atmosphere @ concentration high enough to affect climate/harm organisms and materials: increasing due to fossil fuels (car emissions especially) Sources: mobile human, planes, cars, ships, stationary human, factories, natural, dust, volatile organic compounds (voc) from plants, plant decay, forest fires, volcanoes, sea spray. Types: primary pollutants: so2, nitrogen monoxide/dioxide (nox), carbon.
