Do Now:

• Video Clip: EPA PSA on Indoor Air Quality 1) How are our own homes dangerous to our

health? 2) List three household items that could cause

harm.• T and T

Aim: Why are our homes hazardous to our health?

Ms. KatzoffFebruary 11, 2013

Indoor Air Pollution (IAP) Is a Serious Problem

• Developing countries– INDOOR burning of wood, charcoal, dung, crop

residues, and coal. – Poor suffer the greatest risk

Burning Wood Indoors in India

Burning Wood Indoors in U.S.

Indoor Air Pollution (IAP) Is a Serious Problem

• Developed countries– Indoor air pollution is greater than outdoor air

pollution

• Why?– 11 of the most common air pollutants higher

inside than outside– Greater in vehicles than outside– We spend 70–98% of our time indoors or in cars

Pause…Write…

• Who is most at risk for indoor air pollution, people living in developing countries or developed? Explain.

Do you understand the difference between IAP for the developing vs.

developed world?

Who is at greatest risk from indoor air pollution?

– Children under 5 and the elderly– Sick– Pregnant women– People with respiratory disorders or heart

problems– Smokers– Factory workers

Dangerous Indoor Pollutants • Four most dangerous:– Tobacco smoke– Formaldehyde– Radioactive radon-222 gas– Very small particles…memory check: what are they

called?

• Sources of these pollutants

• Human health risks

Indoor Air Pollutants• Pesticide residue• Pb particles• Living organisms and their excrements• E.g., Dust mites and cockroach droppings

• Airborne spores of molds and mildews

Fig. 18-19, p. 482

Chloroform Source: Chlorine-treated water in hot showers Possible threat: Cancer

Para-dichlorobenzene Source: Air fresheners, mothball crystals Threat: Cancer

Tetrachloroethylene Source: Dry-cleaning fluid fumes on clothes Threat: Nerve disorders, damage to liver and kidneys, possible cancer

Formaldehyde Source: Furniture stuffing, paneling, particleboard, foam insulation Threat: Irritation of eyes, throat, skin, and lungs; nausea; dizziness1,1,1-Trichloroethane

Source: Aerosol sprays Threat: Dizziness, irregular breathing

Styrene Source: Carpets, plastic products Threat: Kidney and liver damage

Nitrogen oxides Source: Unvented gas stoves and kerosene heaters, woodstoves Threat: Irritated lungs, children's colds, headaches Benzo- -pyrene

Source: Tobacco smoke,woodstoves Threat: Lung cancer

Particulates Source: Pollen, pet dander, dust mites, cooking smoke particles Threat: Irritated lungs, asthma attacks, itchy eyes, runny nose, lung disease Radon-222 Source:

Radioactive soil and rock surrounding foundation, water supply Threat: Lung cancer

Tobacco smoke Source: Cigarettes Threat: Lung cancer, respiratory ailments, heart disease

Asbestos Source: Pipe insulation, vinyl ceiling and floor tiles Threat: Lung disease, lung cancer

Carbon monoxide Source: Faulty furnaces, unvented gas stoves and kerosene heaters, woodstoves Threat: Headaches, drowsiness, irregular heartbeat, death

Methylene chloride Source: Paint strippers and thinners Threat: Nerve disorders, diabetes

Pollutant Activity• Each table will be given a different IAP fact

sheet.• Using the information you will complete the

IAP chart for your pollutant.• Fill in your pollutant on the IAP chart on the

board.

Standards: CC #7

Summary:

• In your groups, come to a consensus about whether or not the product is worth the risk of using? Explain your answer.

Do you understand how harmful IAP are to your health?

Summary:

• What are some steps you could take to prevent indoor air pollution, especially regarding the four most dangerous indoor air pollutants?

Homework:

• Read pages 485-489 - Case studies are important!• Air pollution test Friday 2/15.