character: Dr. John Michaels
topic: Effects of Heavy Metals on Ecosystems
grade: 9
subject: Biology
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character: Ms. Laura Green
topic: Bioaccumulation and Biomagnification of Heavy Metals
grade: 9
subject: Biology
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character: Mr. Tom Rivers
topic: Impact of Pollution on Aquatic Ecosystems
grade: 9
subject: Biology
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character: Dr. Emily Carter
topic: Toxicology and Its Effects on Wildlife
grade: 9
subject: Biology
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