character: Emily Chen
topic: Biodegradable Materials and Their Impact on Waste Management
grade: 9
subject: Science
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character: Dr. Mark Thompson
topic: The Role of Composting in Waste Reduction
grade: 9
subject: Science
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character: Lisa Martinez
topic: Innovations in Eco-Friendly Packaging
grade: 9
subject: Science
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character: Kevin Zhang
topic: Recycling vs. Biodegradable Materials: Which is Better?
grade: 9
subject: Science
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