character: Ms. Laura Green
topic: Bioaccumulation and Biomagnification of Heavy Metals
grade: 9
subject: Biology
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character: Dr. Emily Carter
topic: Effects of Heavy Metals on Aquatic Ecosystems
grade: 9
subject: Biology
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character: Mr. Tom Robinson
topic: Food Chains and Trophic Levels
grade: 9
subject: Biology
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character: Ms. Sarah Lopez
topic: Environmental Impact of Pollutants
grade: 9
subject: Biology
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