character: Thames Water
topic: Evolution of Water Filtration in the 19th Century
grade: 11
subject: Chemistry
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character: John Snow
topic: Cholera Outbreak and Water Quality
grade: 11
subject: Chemistry
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character: Joseph Bazalgette
topic: Sewage System and Urban Sanitation
grade: 11
subject: Chemistry
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character: Thomas Tredgold
topic: Early Water Treatment Techniques
grade: 11
subject: Chemistry
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