Warsaw it's a little polluted city. Mostly in undergrounds in centrall train station.
I was in hospital for one day because Wrocław doesn't have medical specialists from wilson disease. So! Long way in train in night. Clear night sky i seen by the window. Full of stars. Amazing view, particulary when train rushes trough the empty fields or forrest. Every time when i traveling by night train its like in this illustration . it's probably one of most beautiful things what i ever seen.