character: Chemistry Guru
topic: Catalysts in Environmental Chemistry
grade: 9
subject: Chemistry
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character: EnviroChem Expert
topic: Role of Catalysts in Pollution Control
grade: 9
subject: Chemistry
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character: Dr. Eco
topic: Green Chemistry and Catalysis
grade: 9
subject: Chemistry
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character: Professor Catalyst
topic: Benefits of Catalysts in Reducing Waste
grade: 9
subject: Chemistry
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