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Particulate Pollution

Particulate Pollution. Chapter 19 Section 1. - solid particles and liquid droplets suspended in the air can damage plants, buildings, and harm lungs. 1. particulate matter. carried in wind from dusty, unpaved road, construction sites, and land that has been cleared

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Particulate Pollution

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  1. Particulate Pollution Chapter 19 Section 1

  2. - solid particles and liquid droplets suspended in the air • can damage plants, buildings, and harm lungs 1. particulate matter • carried in wind from dusty, unpaved road, construction sites, and land that has been cleared • 1/7 the diameter of human hair 2. coarse particulate

  3. ¼ the size of coarse particulate • released from fires, vehicle exhaust, factories, and power plants 3. fine particulate

  4. causes or might cause cancer or other serious human health problems • more than 180 different substances • most released by human activities • example- carbon monoxide- released mostly from cars- poisonous at high concentrations 4. toxic air pollutants

  5. mobile sources (50%)- cars, trucks, planes • major sources (26%)- power plants, factories, oil refineries, and chemical manufacturers • area sources (24%)- businesses like gas stations and dry cleaners 5. sources of toxic air pollutants

  6. chlorofluorocarbons • used in air conditioners, refrigerators, and aerosol sprays • 1974 theorized they damage the atmosphere 6. CFCs

  7. ozone layer absorbs Sun’s harmful rays • mid 1980’s discovered hole over Antarctica • 1987- restricted use of CFCs • 1996- stopped production 7. ozone depletion

  8. Sun’s rays hit CFC chlorine breaks away chlorine hits an O₃ molecule chlorine takes 1 oxygen and leaves 2 oxygen hits chlorine and oxygen pair and takes back the oxygen chlorine goes and finds another O₃ molecule to break up 8. Steps in ozone depletion

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