2. PowerPoint ® Presentation Chapter 3 Contaminants Poor Indoor Air Quality Effects of Poor Indoor Air Quality Particles Asbestos Lead Gases Carbon Dioxide Carbon Monoxide Radon Mixtures Biological Contaminants Microbial Contaminants

3. PowerPoint ® Presentation Chapter 3 Contaminants Poor Indoor Air Quality Effects of Poor Indoor Air Quality Particles Asbestos Lead Gases Carbon Dioxide Carbon Monoxide Radon Mixtures Biological Contaminants Microbial Contaminants

4. Chapter 3–Contaminants Contaminants may originate outdoors or indoors and often follow a certain airflow path.

5. Chapter 3–Contaminants Asbestos is a mineral fiber that has been used commonly in a variety of building construction materials including pipe insulation, ceiling tiles, and building fireproofing.

6. Chapter 3–Contaminants Lead can be found in common sources such as drinking water, air, and soil. However, in sources such as old paint and lead pipes, there is a larger risk of lead becoming a harmful pollutant.

7. Chapter 3–Contaminants Mold spores grow in areas with excessive moisture or accumulated water. Mold can grow on a variety of materials including ceiling tiles and wallboard.

8. Chapter 3–Contaminants Carbon monoxide is an odorless, colorless, and toxic gas that can be produced from traffic, unventilated parking garages, heating equipment, and environmental tobacco smoke.

9. Chapter 3–Contaminants Sources of NO 2 include truck and bus emissions, kerosene heaters, unvented gas stoves and heaters, gasoline engines operated indoors, and environmental tobacco smoke.

10. Chapter 3–Contaminants Formaldehyde is used in a wide variety of products including particleboard, plywood, cosmetics, and permanent press fabrics. Formaldehyde is also released during certain activities, such as burning wood.

11. Chapter 3–Contaminants High levels of exposure to ozone has certain health effects and risk factors. Several U.S. government agencies have developed standards relating to the allowable amount of ozone exposure for humans.

12. Chapter 3–Contaminants Exposure to high levels of radon may lead to lung cancer. Radon levels are measured in picocuries per liter (pCi/L).

13. Chapter 3–Contaminants Volatile organic compounds are used in many products including cleaners, pesticides, paints and glue, cosmetics, perfumes, draperies, and carpets.