character: Professor John Sea
topic: Studying Changes in Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Ecosystem Dynamics
topic: Impact of Chemical Changes on Aquatic Life
grade: 11
subject: Chemistry
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character: Water Chemistry
topic: Role of pH and Nutrients in Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Aquatic Biodiversity
topic: Effects of Pollution on Aquatic Species
grade: 11
subject: Chemistry
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