character: Dr. Emily Johnson
topic: Hazardous Waste Disposal Techniques
grade: 12
subject: Chemistry
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character: Dr. Sarah Thompson
topic: Chemical Safety and Environmental Protection
grade: 12
subject: Chemistry
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character: Professor Robert Lee
topic: Waste Management Practices in Chemistry
grade: 12
subject: Chemistry
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character: Dr. Maria Gonzalez
topic: Advanced Toxicology and Waste Treatment Methods
grade: 12
subject: Chemistry
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