character: Mr. Smith
topic: Impact of Industrial Waste on Water Quality
grade: 11
subject: Chemistry
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character: Dr. Jones
topic: Effects of Heavy Metals on Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Taylor
topic: Chemical Reactions in Water Pollution
grade: 11
subject: Chemistry
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character: Mr. Brown
topic: Environmental Regulations and Water Safety
grade: 11
subject: Chemistry
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