character: Ecosystem Dynamics
topic: Impact of Chemistry on Ecosystems
grade: 12
subject: Chemistry
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character: Biogeochemical Cycles
topic: Role of Chemical Elements in Ecosystem Functioning
grade: 12
subject: Chemistry
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character: Chemical Pollution
topic: Effects of Chemicals on Ecosystem Health
grade: 12
subject: Chemistry
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character: Acid Rain
topic: Chemical Reactions and Their Ecological Consequences
grade: 12
subject: Chemistry
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