The localisation of it struck me when I read an Irish EPA report on traffic-related air pollution a few years ago that recommended carrying your child if you were walking regularly near heavy traffic. The air at 0.8m (their breathing height) has 5-15% more NOx in it than the air at 2m (the height they would breath at being carried by you).
replyI remember reading something similar about walking on the part of the pavement furthest from the road, because being an extra meter or so away makes a big difference
replyA quick note for my fellow US Americans -- A British speaker calling it 'pavement' is referring to what we call the sidewalk.
replyMost air pollution is pretty localized. CFCs and greenhouse gases are the biggest outliers for how global their effects are.
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