character: Solar Sam
topic: Renewable Energy Economics
grade: 8
subject: Economics
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character: Windy Wanda
topic: Economic Benefits of Wind Energy
grade: 8
subject: Economics
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character: Geothermal Gary
topic: Cost Analysis of Geothermal Energy
grade: 8
subject: Economics
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character: Hydro Helen
topic: Financial Impact of Hydropower
grade: 8
subject: Economics
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