This is a fascinating read about how #Aachen in #Germany is improving air quality - I particularly appreciate the explanation of how air moves etc and the positive effects of green spaces.

If only UK #LocGov explained things like this!

https://www.aachen.de/DE/stadt_buerger/umwelt/luft-stadtklima/luftreinhalteplan_umweltzone/luftreinhaltung/index.html