character: Mr. Alan Smith
topic: Chemical Reactions in Water Quality Management
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Impact of pH Levels on Aquatic Life
grade: 12
subject: Chemistry
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character: Mrs. Jane Doe
topic: Biochemical Oxygen Demand and Its Significance
grade: 12
subject: Chemistry
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character: Mr. Robert Johnson
topic: Nutrient Pollution and Eutrophication Effects
grade: 12
subject: Chemistry
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