character: Dr. Emily Carter
topic: Impact of Nutrients on Aquatic Ecosystems
grade: 12
subject: Chemistry
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character: Dr. John Smith
topic: Effects of pH Levels on Marine Life
grade: 12
subject: Chemistry
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character: Dr. Sandra Lee
topic: Role of Algae in Freshwater Systems
grade: 12
subject: Chemistry
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character: Dr. Mark Thompson
topic: Chemical Indicators of Water Quality
grade: 12
subject: Chemistry
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