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Almost half of the world's busiest airports have no-smoking policies

iStock/Thinkstock(NEW YORK) -- Air travellers might have trouble lighting up before taking off. That's because a new report from the Centers for Disease Control and Prevention finds 46% of the world's busiest airports - from Seoul to San Francisco - now ban smoking indoors.

The report surveyed the 50 most trafficked airports in the world, 23 of which prohibit smoking indoors. The remaining 27 airports allow smoking in designated areas within the building, such as restaurants, bars, or airline clubs.

78% of the North American airports included in the report ban smoking, while 44% of European airports and only 18% of Asian airports had a similar rule.

More than 2.7 billion travellers pass through the airports mentioned in the report every year.

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