1. Air Pollution
Indoor Air Pollution

2. 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?

3. 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

4. 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

5. Environmental Tobacco Smoke
Secondhand smoke
2 sources
Smoke exhaled by smokers
Smoke emitted from burning tobacco
The most hazardous indoor pollutant

6. Questions 1. Please explain why radon is a problem. 2
Questions 1. Please explain why radon is a problem? 2. Is radon a large hazard? If so why? If not, why?

7. Radon Gas Radon Health hazard when leaked into homes
Naturally occurring radioactive gas
Colorless, odorless, tasteless
Only identified through proper testing
Health hazard when leaked into homes
Exposure is associated with lung cancer

8. How Radon Enters Houses
Please read page 574 and explain how radon enters houses.

9. Major Indoor Pollutants
1, 1, 1-Trichloroethane
Aerosol sprays
Dizziness, breathing irregularities
Asbestos
Pipe insulation, ceilings, floor tiles, oven mitts
Lung Cancer and asbestosis
Benzo-a- pyrene
Tobacco smoke, woodstoves
Lung Cancer
Carbon Monoxide
Faulty furnaces, cigarette smoke
Headache, heartbeat irregularities, death, CO has 250x affinity for Hb than O2

10. 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
Para-dichlorobenzene
Air fresheners, mothballs

11. Major Indoor Pollutants Continued…
Radon – 22
Soil and rock near house foundation, concrete
Lung cancer
Styrene
Carpets, plastics,
Kidney and liver damage
Tetrachlor-
ethylene
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