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Yesterday, 23:22

Why do some states require emissions testing? A. to reduce air pollution B. to reduce water pollution C. to conserve energy resources D. to increase fuel efficiency

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  1. Today, 03:02
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    Answer: A. to reduce air pollution
  2. Today, 03:22
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    A. to reduce air pollution

    Explanation:

    air pollution is often caused by the gases formed by vehicles, so A would be your answer
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