character: Dr. Rachel Brown
topic: Ecological Consequences of Heavy Metal Accumulation in Soil
grade: 9
subject: Biology
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character: Dr. John Smith
topic: Impact of Soil Contamination on Plant Growth
grade: 9
subject: Biology
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character: Ms. Laura Green
topic: Effects of Heavy Metals on Aquatic Ecosystems
grade: 9
subject: Biology
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character: Mr. James White
topic: Bioremediation Techniques for Heavy Metal Removal
grade: 9
subject: Biology
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