character: Dr. Tom Roberts
topic: Impact of fertilizers on freshwater organisms
grade: 9
subject: Chemistry
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character: Dr. Emily Carter
topic: Effects of nutrient runoff on aquatic ecosystems
grade: 9
subject: Chemistry
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character: Professor John Smith
topic: Water quality and the role of fertilizers
grade: 9
subject: Chemistry
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character: Ms. Sarah Brown
topic: Impact of chemical fertilizers on biodiversity in lakes
grade: 9
subject: Chemistry
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