Rome is a dirty city. I lived there for almost two years and can tell you that there is alot of traffic. As beautiful as it is, it looks and smells dirty. Apparently also ‘dirty’ in the sense of ‘immoral.’ Italy’s National Research Council found that there’s traceable particles of weed and coke in the air. With the highest concentrations in the city centre and by the university. I think that’s pretty awesome. Also surprising and hard to believe. And too minute to get you high.