Properties of Hazards: Dangerous Living: Offers information about work-related health risks, such as noise, vibration, toxic metals, and radiation. Includes lesson and activities. [Pre-test and post-test require file download.]Properties of Hazards: Invisible Intruders: Teaches about health risks from infectious microorganisms, such as bacteria, viruses, and fungi. Includes lesson and activities. [Pre-test and post-test require file download.]Properties of Hazards: Life Saver or Rat Poison?: Learn about health risks from chemicals, such as weed killers, household cleaners, and bug sprays. Includes lesson and activities. [Pre-test and post-test require file download.]Properties of Hazards: To Solve or Not to Dissolve: Discusses the health hazards of organic solvents, such as gasoline, paint, degreasers, and glues. Includes lesson and activities. [Pre-test and post-test require file download.]The War on Mercury: Updated information on the link between illness and mercury in dental fillings. Includes assertions, results from two Swiss studies, and biological dentistry.