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LeftishBrit

(41,396 posts)
7. I suspect that it may be more a combination of genetics and relatively low exposure to pollutants.
Wed May 9, 2012, 08:10 AM
May 2012

After all, in the recent past and possibly still, people with chest trouble, who could afford to do so, were often advised to take trips to Switzerland and spend time in the Swiss mountain air. Partly the altitude, but also the relatively clean air in such places. Asthma and respiratory allergies do seem more common in towns where people are exposed to lots of pollution.

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