character: Mark Chen
topic: Environmental Chemistry and Human Exposure
grade: 11
subject: Chemistry
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character: Alice Johnson
topic: Impact of Pollutants on Human Health
grade: 11
subject: Chemistry
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character: Dr. Emily Chen
topic: Chemical Pathways of Environmental Contaminants
grade: 11
subject: Chemistry
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character: Robert Smith
topic: Assessing Chemical Risks in Urban Environments
grade: 11
subject: Chemistry
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