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character: Eco-Warrior
topic: How Trees Clean the Air
grade: 4
subject: Science
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character: Tree Guardian
topic: The Importance of Trees in Our Ecosystem
grade: 4
subject: Science
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character: Air Quality Avenger
topic: How Plants Improve Air Quality
grade: 4
subject: Science
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character: Nature Protector
topic: The Role of Trees in Carbon Dioxide Absorption
grade: 4
subject: Science
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