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How are the changes in atmospheric carbon dioxide described? A. Carbon dioxide levels have increased B.carbon dioxide levels cannot be ensured C. Carbon dioxide have remained the same. D. Carbon dioxide
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How are the changes in atmospheric carbon dioxide described? A. Carbon dioxide levels have increased B.carbon dioxide levels cannot be ensured C. Carbon dioxide have remained the same. D. Carbon dioxide levels have decreased

User Mcruz
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A. Carbon dioxide levels have increased

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