[occz]

Stockholm isn't particularly windy.

I think cars generally contribute to bad smells, and poor waste management infrastructure can also contribute to bad smells (think garbage bins out on streets instead of enclosed, for example)

[fogihujy]

It's situated on an archepilago in the Baltic sea. Sure, it might be less windy than other coastal cities, but Stockholm is far windier than cities in-land.

Stockholm has tolls to reduce road congestion though. The place was definitely smellier back in the 90's.