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Summertime ozone levels in the U.S. could rise 70% by 2050, according to a new study. Warmer temperatures related to climate change are spurring chemical reactions that increase overall levels of ground-level ozone, which can aggravate health problems such as asthma, bronchitis and emphysema.

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DISCUSSION

99telepodproblems
99TelepodProblems

But humans can't cause changes the earth's atmosphere. Increased ozone must be a natural cycle.