character: Rachel Carson
topic: Effects of Pollution on Marine Life
grade: 9
subject: Geography
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character: Rachel Carson
topic: Environmental Awareness
grade: 9
subject: Geography
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character: Marine Biologists
topic: Impact of Chemicals on Marine Ecosystems
grade: 9
subject: Geography
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character: Environmental Scientists
topic: Biological Indicators of Ocean Health
grade: 9
subject: Geography
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