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character: Environmental Scientist
topic: Indicators of Water Quality in Aquatic Systems
grade: 9
subject: Biology
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character: Biologist
topic: Effects of Pollution on Aquatic Life
grade: 9
subject: Biology
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character: Marine Ecologist
topic: Biodiversity in Aquatic Ecosystems
grade: 9
subject: Biology
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character: Water Quality Technician
topic: Methods of Testing Water Quality
grade: 9
subject: Biology
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