character: Ms. Johnson
topic: Ecological Consequences of Chemical Use
grade: 12
subject: Biology
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character: Mr. Smith
topic: Impact of Pesticides on Biodiversity
grade: 12
subject: Biology
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character: Dr. Lee
topic: Chemical Runoff and Aquatic Ecosystems
grade: 12
subject: Biology
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character: Ms. Garcia
topic: Bioaccumulation of Toxins in Food Chains
grade: 12
subject: Biology
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