character: Dr. James Carter
topic: Freshwater Ecosystem Dynamics
grade: 12
subject: Chemistry
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character: Dr. Linda Morris
topic: Chemical Properties of Water in Ecosystems
grade: 12
subject: Chemistry
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character: Professor Sarah Lee
topic: Impact of pH on Freshwater Organisms
grade: 12
subject: Chemistry
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character: Dr. Michael Brown
topic: Nutrient Cycling in Freshwater Environments
grade: 12
subject: Chemistry
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