Seeking Best Air Quality in Aburrá Valley, Metro Medellin

Is smog and air pollution primarily a center-city problem in Medellin ... or is it a valley-wide phenomenon in 2016, from Copacabana to Itaguí ?

Without going high up into the hills, where is the best place in the valley for Expats to live for breathable air?

cccmedia in Quito, Ecuador

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