character: Dr. Emily Johnson
topic: The Impact of Hydroelectric Power on the Environment
subject: Science
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character: Dr. Mark Thompson
topic: Renewable Energy Sources and Their Environmental Challenges
subject: Science
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character: Dr. Lisa Chen
topic: Sustainable Energy Solutions: Hydroelectric vs. Solar Power
subject: Science
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character: Prof. John Smith
topic: The Ecological Effects of Dams on River Ecosystems
subject: Science
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