character: Professor Sarah Lee
topic: Impact of pH on Freshwater Organisms
grade: 12
subject: Chemistry
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character: Dr. Emily Chen
topic: Effects of Acid Rain on Aquatic Life
grade: 12
subject: Chemistry
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character: Mr. James Porter
topic: Role of pH in Aquatic Ecosystems
grade: 12
subject: Chemistry
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character: Ms. Laura Kim
topic: Pollution and pH Changes in Freshwater Bodies
grade: 12
subject: Chemistry
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