Synthetic chemicals such as pharmaceuticals, disinfectants, pesticides Result from ecological interactions Species parasitize humans, fulfilling their ecological roles An organism that transfers a pathogen to a host Result from where we live, our socioeconomic status, our occupation, our behavioral choices or lifestyle hazards A highly toxic, radioactive gas that is colorless and undetectable and can seeps naturally from bedrock A mineral that insulates, muffles sounds, and resists fire Scarred lungs that cease to function Another indoor poisoning and caused by lead, a heavy metal

1. Chemical hazards

Synthetic chemicals such as pharmaceuticals, disinfectants, pesticides

2. Biological hazards

Result from ecological interactions

3. Infectious disease

Species parasitize humans, fulfilling their ecological roles

4. Vector

An organism that transfers a pathogen to a host

5. Cultural hazards

Result from where we live, our socioeconomic status, our occupation, our behavioral choices or lifestyle hazards

6. Radon

A highly toxic, radioactive gas that is colorless and undetectable and can seeps naturally from bedrock

7. Asbestos

A mineral that insulates, muffles sounds, and resists fire

8. Asbestosis

Scarred lungs that cease to function

9. Lead poisoning

Another indoor poisoning and caused by lead, a heavy metal. Damages the brain, liver, kidney, and stomach. Causes learning problems, behavior abnormalities, and death.

10. PBDEs

Has fire-retardant properties ( evaporate at very slow rate). Used in computers, televisions, plastics, and furniture. Mimic hormones and affect thyroid hormones.