e21.    What are chemical hazards?

Chemical hazards require a known dose and response. Whether a chemical is harmful depends on how big the dose is during a certain amount of time, and how often an exposure occurs. How well the body's detoxification system works determines whether someone has an acute effect (an immediate or rapid reaction), or a chronic effect (a long-lasting effect). There are several types of chemical hazards. Toxic chemicals are fatal to over 50% of test animals at stated concentrations. Cancers, which can be caused by chemicals, occur when certain cells multiply uncontrollably and invade surrounding tissue. Carcinogens cause or promote the growth of a malignant (cancerous) tumor. Mutagens are agents that cause mutations. Teratogens are chemicals that cause birth defects.  

g17.    Is some matter more useful than other matter?

g19.    Where do you find air pollution?

m31.    Is nuclear energy a viable alternative?

m34.    How could food production affect the environment?

m39.    How does ozone affect life?

m41.    How can matter affect the environment?

m44.    Why are there detractors of pesticides?

m46.    How do pesticides impact the environment?

m48.    What is in pesticides and what do they do?

m50.    What other types of pollutants are there?

m51.    Where do pollutants come from?

m57.    What are sources of solid waste?

m64.    How much ionizing radiation are we exposed to?

m65.    What cause biological hazards?

m66.    How can risks be analyzed?

m67.    Are there problems with risk analysis?

m68.    How are risks managed?

m69.    How can risk factors for cancer be analyzed?

m70.    What are hazardous wastes?

m71.    What chemicals pose a danger?

m72.    What are your options for dealing with hazardous materials?

m73.    Are hazardous wastes regulated in the U.S.?  

m76.    What contaminates soil?