Transcript Indoor Pollution - AP Environmental science

Air Pollution
Indoor Air Pollution
Questions
1. Some scientists claim that indoor pollution is
more fatal than outdoor pollution, what about indoor
pollution makes this a valid claim?
2. Based on your understanding of indoor and
outdoor, do you agree?
Pathways, Processes and
Driving Forces
• Chimney Effect (Stack Effect)
– Process whereby warmer air rises in
buildings to upper levels and is
replaced in the lower portion of the
building by outdoor air drawn through
a variety of openings, such as
windows doors or cracks in the
foundation or walls
Sick Building Syndrome
• A condition associated with an
indoor environment that appears
to be unhealthy
• The symptoms people report
cannot be traced to any one
particular cause
Environmental Tobacco
Smoke
• Secondhand smoke
• 2 sources
– Smoke exhaled by smokers
– Smoke emitted from burning tobacco
• The most hazardous indoor
pollutant
Questions
1. Please explain why radon is a
problem?
2. Is radon a large hazard? If so why? If
not, why?
Radon Gas
• Radon
– Naturally occurring radioactive gas
– Colorless, odorless, tasteless
– Only identified through proper testing
• Health hazard when leaked into
homes
• Exposure is associated with lung
cancer
How Radon
Enters Houses
Please read page 574 and explain how radon enters houses.
Major Indoor Pollutants
1, 1, 1Aerosol sprays
Trichloroethane
Dizziness, breathing
irregularities
Asbestos
Pipe insulation,
ceilings, floor tiles,
oven mitts
Lung Cancer and
asbestosis
Benzo-apyrene
Tobacco smoke,
woodstoves
Lung Cancer
Carbon
Monoxide
Faulty furnaces,
cigarette smoke
Headache, heartbeat
irregularities, death, CO
has 250x affinity for Hb
than O2
Major Indoor Pollutants Continued…
Chloroform
Pulp and paper mills,
water and wastewater
plants
Cancer
Formaldehyde
Paneling, particle
board, furniture,
carpeting, adhesives
Nausea, dizziness,
irritation of throat,
eyes, and lungs
Methylene
chloride
Paint strippers and
thinner – persistent
Nerve disorders,
diabetes
Nitrogen oxides
Furnaces, stoves,
fireplaces and vents
Headaches, irritated
lungs
Paradichlorobenzene
Air fresheners,
mothballs
Cancer
Major Indoor Pollutants Continued…
Radon – 22
Soil and rock near
house foundation,
concrete
Lung cancer
Styrene
Carpets, plastics,
Kidney and liver
damage
Tetrachlorethylene
Dry-cleaning fluid
Nerve disorders,
damage to liver and
kidneys, cancer
Tobacco Smoke
Cigarettes and other
smoking sources
Lung cancer and
heart disease
Organic
Material
Dust mites, fungal and
algal spores, dust
(human skin), animal
dander, hair, carpet
fibers, fur
Allergies, coughs,
sneezing, eye
irritation, sore
throats, difficulty
breathing
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