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Air Pollution
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The most dangerous city in the world for children due to polluted air…
Mexico City
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Clean Air Nitrogen gas (78%) and Oxygen gas (21%) Argon Carbon Dioxide
Water Vapor
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Polluted Air Harmful substances that build up in air
Substances include: solids, liquids, gases
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Air Pollution Human Activities: burning fossil fuels
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Natural Air Pollution Volcanoes (ash and sulfur dioxide) Dust Pollen
Spores
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Primary Pollutants Put directly into the air by humans TRANSPORTATION
DEMOLITION INDUSTRY EXHAUST BURNING
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Carbon Monoxide (CO) Odorless, colorless, poisonous gas
Burning…cars, furnace Drowsiness and death
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Secondary Pollutants Chemical reactions between primary pollutants and water vapor SMOG ACID RAIN
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Nitrogen Oxide Gas with brownish haze
Burning…cars, power plants, boilers Lung cancer, acid rain, respiratory probs
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Sulfur Dioxide Gas (smells like rotten eggs)
Burning…coal, power plants Acid Rain Harms plants/fish Respiratory probs Corrosive
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World Air Quality Problems
As countries become more developed they are more likely to use fossil fuels Most air pollution comes from cars and industry Motor Vehicle Emissions: About one/third of all air pollution comes from burning GAS The Clean Air Act (1970) required: catalytic converters, unleaded gas, improved mpg
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Industrial Air Pollution
Industries and power plants: burn fuel for energy Huge quantities of sulfur dioxide (coal) and nitrogen oxide (oil/gas) are released into the air Other industries produce VOC’s that form toxic fumes Dry cleaning, oil refineries, manufacturing, furniture refinisher, auto repair shop, aerosols
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SMOG In many urban areas, air pollution gets trapped in cities and appears as a gray haze that reduces visibility. Made of sun, air, exhaust, and ozone Worst places for smog: LA Denver Phoenix
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Temperature Inversion
Diagram:
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