character: Dr. John Smith
topic: Properties of Polyethylene in Packaging
grade: 11
subject: Chemistry
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character: Chemistry Expert
topic: Chemical Properties of Common Plastics
grade: 11
subject: Chemistry
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character: Research Scientist
topic: Applications of Polyethylene in Food Packaging
grade: 11
subject: Chemistry
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character: Environmental Scientist
topic: Impact of Polyethylene on the Environment
grade: 11
subject: Chemistry
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