character: Dr. Emily Carter
topic: Impact of pH on Ecosystems
grade: 12
subject: Chemistry
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character: Professor John Smith
topic: Acid-Base Chemistry and Water Quality
grade: 12
subject: Chemistry
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character: Dr. Sarah Thompson
topic: Effects of pH on Aquatic Life
grade: 12
subject: Chemistry
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character: Dr. Michael Brown
topic: Soil pH and Nutrient Availability
grade: 12
subject: Chemistry
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