character: Ms. Brown
topic: Balancing Chemical Equations for Pollution Control
grade: 12
subject: Chemistry
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character: Mr. Smith
topic: Environmental Chemistry and Its Applications
grade: 12
subject: Chemistry
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character: Dr. Johnson
topic: Green Chemistry Practices
grade: 12
subject: Chemistry
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character: Ms. Taylor
topic: Chemical Reactions in Atmospheric Pollution
grade: 12
subject: Chemistry
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