character: James Smith
topic: Identifying Sources of Water Contaminants
grade: 9
subject: Science
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character: Dr. Emily Carter
topic: Types of Water Pollution
grade: 9
subject: Science
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character: Maria Gonzalez
topic: Effects of Contaminants on Aquatic Life
grade: 9
subject: Science
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character: Tom Jenkins
topic: Methods of Water Testing for Contaminants
grade: 9
subject: Science
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