character: Hank Green
topic: Impact of Acid Rain on Ecosystems
grade: 11
subject: Chemistry
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character: Hank Green
topic: Chemical Reactions and Environmental Chemistry
grade: 11
subject: Chemistry
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character: Hank Green
topic: Effects of Pollution on Biodiversity
grade: 11
subject: Chemistry
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character: Hank Green
topic: The Chemistry of Climate Change
grade: 11
subject: Chemistry
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