Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't. Which planet released more chlorine gas in their atmosphere?
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Answer: planet U

Nigeria invested in sand mining and started mining coastal barriers. Congo continued preserving their picturesque beaches. Which country destroyed more fisheries?
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Answer: Nigeria

Two neighboring regions were exposed to different levels of abiotic stress. Eastern region was exposed to high levels of abiotic stress, while Western region was almost stress-free. Which region had fewer threatened species inhabiting it?
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Answer:
Eastern