character: Dr. Waterman
topic: Introduction to Water Treatment Systems
grade: 10
subject: Science
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character: Biologist Bob
topic: Understanding Microbial Processes in Water Treatment
grade: 10
subject: Science
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character: Engineer Emily
topic: Chemical Treatments in Water Purification
grade: 10
subject: Science
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character: Environmental Expert
topic: Importance of Biological Systems in Sustainable Water Treatment
grade: 10
subject: Science
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