character: Mr. David Johnson
topic: Environmental Chemistry and Risk Assessment Practices
grade: 11
subject: Chemistry
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character: Dr. Emily Carter
topic: Impact of Pollution on Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Sarah Thompson
topic: Toxicology and Risk Management in Environmental Health
grade: 11
subject: Chemistry
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character: Mr. Robert Lee
topic: Sustainable Chemical Practices in Industry
grade: 11
subject: Chemistry
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