... Consequently, the choice of materials to collect is in the first place determined by the value of the waste, and in the second place by their ease of extraction, handling and transport. Paper, metals and ... part of the burden of the mu-nicipal waste collection by sorting out the recycling materials in richer areas. On the other hand, part of the waste collection in poorer areas, not served by the ... 2face harassments and a negative attitude towards them. Despite the contribution to the waste management of the city, the efforts of the IS are not recognised or supported by the city au-thorities....