character: Ella the Engineer
topic: Innovations in Hydroelectric Power
grade: 10
subject: Science
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character: Ella the Engineer
topic: Renewable Energy Sources
grade: 10
subject: Science
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character: Ella the Engineer
topic: Engineering Design Process
grade: 10
subject: Science
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character: Ella the Engineer
topic: Environmental Impact of Hydropower
grade: 10
subject: Science
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