chapter 17 section 17-5; indoor air pollution. objective: evaluate the types and effects of indoor...
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CHAPTER 17CHAPTER 17
Section 17-5; Indoor Section 17-5; Indoor Air PollutionAir Pollution
OBJECTIVE:OBJECTIVE:
Evaluate the types and effects of indoor Evaluate the types and effects of indoor air pollution.air pollution.
What Do You Think?What Do You Think? What is the most dangerous What is the most dangerous indoorindoor air air
pollutant?pollutant?
INDOOR AIR POLLUTIONINDOOR AIR POLLUTION Indoor air pollution usually is a greater Indoor air pollution usually is a greater
threat to human health than outdoor air threat to human health than outdoor air pollution.pollution.
Four most dangerous Four most dangerous indoor air pollutants indoor air pollutants (developed):(developed): Tobacco smokeTobacco smoke FormaldehydeFormaldehyde RadonRadon Fine and ultrafine particlesFine and ultrafine particles
WHY?WHY? More time insideMore time inside Reduced air exchangeReduced air exchange Pollutants concentratedPollutants concentrated ““Sick Building Syndrome”Sick Building Syndrome”
Chloroform
Benzo--pyrene
Styrene
Radon-222
Methylene Chloride
Tobacco Smoke
Carbon Monoxide
Asbestos
Nitrogen Oxides
1, 1, 1-Trichloroethane
Particulates
FormaldehydeTetrachloroethylene
Para-dichlorobenzene
Fig. 17-17, p. 434
RADIOACTIVE RADON-222RADIOACTIVE RADON-222
Seep into homesSeep into homes Increase the risk Increase the risk
of lung cancerof lung cancer Smoking linkSmoking link TestTest MitigationMitigation
ASBESTOSASBESTOS
Fibrous mineralFibrous mineral Crumbles into Crumbles into
dustdust Asbestosis, lung Asbestosis, lung
cancer, cancer, mesotheliomamesothelioma
Smoking linkSmoking link
Fig. 19-20, p. 461
Solutions
Indoor Air Pollution
Prevention
Cover ceiling tiles & lining of AC ducts to prevent release of mineral fibers
Use adjustable fresh air vents for work spaces
Increase intake of outside airBan smoking or limit it to well ventilated areas
Change air more frequently
Set stricter formaldehyde emissions standards for carpet, furniture, and building materials
Circulate a building’s air through rooftop green houses
Prevent radon infiltration Use exhaust hoods for stoves and appliances burning natural gasUse office machines in well
ventilated areas
Use less polluting substitutes for harmful cleaning agents, paints, and other products
Install efficient chimneys for wood-burning stoves
Cleanup or Dilution
Fig. 19-21, p. 461
What Can You Do?
Indoor Air Pollution
• Test for radon and formaldehyde inside your home and take corrective measures as needed.
• Do not buy furniture and other products containing formaldehyde.
• Remove your shoes before entering your house to reduce inputs of dust, lead, and pesticides.
• Test your house or workplace for asbestos fiber levels and for any crumbling asbestos materials if it was built before 1980.
• Don't live in a pre-1980 house without having its indoor air tested for asbestos and lead.
• Do not store gasoline, solvents, or other volatile hazardous chemicals inside a home or attached garage.
• If you smoke, do it outside or in a closed room vented to the outside.
• Make sure that wood-burning stoves, fireplaces, and kerosene- and gas-burning heaters are properly installed, vented, and maintained.
• Install carbon monoxide detectors in all sleeping areas.
What Do You Think?What Do You Think? What are three of the most dangerous What are three of the most dangerous
indoor air pollutants?indoor air pollutants?
What are two ways to reduce indoor air What are two ways to reduce indoor air pollution?pollution?
OBJECTIVE:OBJECTIVE:
Evaluate the types and effects of indoor Evaluate the types and effects of indoor air pollution.air pollution.