It is one of the areas with the highest population density in Italy. It is an old town centre. It is in Southern Italy, but recycling is working. We are talking about Rione Sanità in the centre of Naples, 67,000 inhabitants with a population density of 13,400 people per km2 (Casavatore, near Naples, one of the most populated municipalities in Italy has “only” 12,253 people per km2), where since December 2014, the collection of cardboard, especially, has become a real success story. Narrow lanes, often uphill, small trading outlets with two markets are just some of the peculiarities that Ambiente Solidale, a social cooperative, has to tackle daily to carry out its cardboard collection in this neighbourhood. A business that very few people would be brave enough to start e...