This could be data dredging since it seems they may have looked at lots of dimensions and picked the one that correlated. It doesn’t make sense to me the effec

This could be data dredging since it seems they may have looked at lots of dimensions and picked the one that correlated. It doesn’t make sense to me the effect of air pollution would be so acute and at such low levels: The effects are present in and out of the home, at levels well below Ambient Air Pollution Standards https://en.m.wikipedia.org/wiki/Data_dredging https://en.m.wikipedia.org/wiki/Data_dredging