character: Dr. Green
topic: Renewable Energy Sources Comparison
grade: 9
subject: Science
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character: Professor Solar
topic: Solar Energy vs. Wind Energy
grade: 9
subject: Science
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character: Engineer Wave
topic: Advantages of Wave Energy
grade: 9
subject: Science
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character: Scientist Hydro
topic: Hydroelectric Power vs. Geothermal Energy
grade: 9
subject: Science
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