MEC 280 Lecture 3: Lecture 5 & 6

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Fuel (gasoline) + air (oxygen) = water + co2 (carbon dioxide) Water + co2 + co + n ox + vhc. Primary pollutant emissions: oxides of nitrogen: n ox, carbon monoxide: co, volatile hydrocarbons: vhc. Release: burning of fossil fuels (coal, oil, natural gas), land clearing, agriculture, etc. Vhc, co, n ox , ozone production, (n2o is also a problem) Catalytic converters eliminate much n ox and co. N ox + co + vhc + sunlight = smog. N o2 + solar radiation n o + o. O2 + o + x o3 + x. X is any molecule such as n2 or o2. E ects of ozone: irritant to the eyes, headaches, cardiovascular stress, weaken immune system, formation of scar tissues. Cars + soot + sox + heavy metals. Tall smoke stacks dump into other backyards and create more pollution! Source: auto exhaust (before 1970"s), paint, candle wicks (2003)

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