character: Dr. Emily Chen
topic: Nanotechnology in Water Treatment
grade: 11
subject: Chemistry
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character: Dr. John Smith
topic: Environmental Chemistry and Nanomaterials
grade: 11
subject: Chemistry
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character: Prof. Sarah Johnson
topic: Applications of Nanotechnology in Environmental Science
grade: 11
subject: Chemistry
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character: Dr. Mark Lee
topic: Pollution Control with Nanotechnology
grade: 11
subject: Chemistry
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