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Toxicology Problem Set
Problem 2: Hazards and sources
For help to answer the question:One of the items below is a hazardous substance.  Four are sources of a hazardous substances.  Which one is a hazardous substance?
| A. | clogged furnace |  
| B. | cigarette |  
| C. | a dog |  
| D. | paint applied before 1978 |  
| E. | dust mite parts |  
Tutorial
A hazardous substance is one that causes harm to our health.  Hazards must come from a source.  Some common hazards and their sources are:
 
| Hazard: | Source: |  
| animal dander | fur-bearing animals, such as dogs or cats |  
| carbon monoxide | broken appliances that incompletely burn natural gas or oil, such as furnaces or stoves |  
| dust mite particles | dust mites living in beds, carpets, curtains, furniture |  
| lead | paint applied before 1978, batteries, water pipes |  
| mercury | thermometers, filling in teeth, batteries |  
| mold spores | molds which are found especially in damp places like showers |  
| tobacco smoke | lighted cigarettes or cigars |  
      
        The Southwest Environmental Health Sciences Center
 The Biology Project
 The University of Arizona
 Tuesday, September 16, 1997
 Contact the Development Team
 
http://biology.arizona.edu
All contents copyright © 1997.  All rights reserved.
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