People's risk of having attacks of breathlessness increased by 13% for every 500-meter segments of main street located within 200 meters of their home. The risk of such attacks among people who had never smoked fell by 12% for each additional 100 meters between their homes and a main street.
Individuals whose homes were within 20 meters of a busy road were 15% more likely to regularly have phlegm in their breathing passages, while they were 34% more likely to have wheezing with breathing problems.
Reuters
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