Train passing at high speed at the station with a lot of garbage in Paris, France

paris underground subway metro public transportation rubbish dirty cleanliness france urban environment litter sanitation hygiene public spaces urban issues maintenance environmental concerns city transportation waste disposal underground transit public health cleanliness standards littering urban challenges municipal services cleanliness issues litter control waste accumulation public perception waste removal subway system litter problems urban cleanliness cityscape waste pollution trash management sanitation services problems issues efforts standards infrastructure decay challenges environment