character: Professor Mark Lee
topic: Chemical Runoff and Its Effects on Aquatic Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Carson
topic: Impact of Nitrogen and Phosphorus in Water Bodies
grade: 12
subject: Chemistry
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character: Dr. John Smith
topic: Chemical Dynamics in Coastal Ecosystems
grade: 12
subject: Chemistry
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character: Ms. Laura Johnson
topic: Effects of Pesticides on Freshwater Habitats
grade: 12
subject: Chemistry
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