character: Ms. Liu
topic: Water quality and its influence on marine ecosystems
grade: 11
subject: Chemistry
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character: Dr. Smith
topic: The chemistry of ocean acidification
grade: 11
subject: Chemistry
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character: Ms. Johnson
topic: Impact of pollutants on marine life
grade: 11
subject: Chemistry
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character: Mr. Patel
topic: Nutrient cycling in aquatic ecosystems
grade: 11
subject: Chemistry
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