This lesson introduces students to the concept of toxic chemicals. Topics include a definition of the term 'toxic', factors that can affect the potential for a chemical to be harmful, and a brief overview of federal agencies that have authority to regulate chemicals in the United States. The lesson includes a a five-part activity in which students use the internet to investigate various toxic chemicals, pollution issues (releases), and some studies on the effects of chemical pollutants in the human body. They will also use data from their household inventories made in the previous exercise (Home Chemicals) to research less hazardous alternatives for each of the products they listed.
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