In Barcelona, domestic garbage is collected every day. This means that the municipal yearly budget for this chapter is huge. In other towns, this collection is done once a week, or twice, or every third day (excluding Sundays). With considerable savings in terms of budget. The goal of this project is to retrieve and compare data for several cities (one of which must be Barcelona). Going from general statistics (like yearly and daily amount in volume and weight, idem. per capita, overall cost, idem. per capita, etc.) to more detailed patterns of personal, and family behaviour in terms of separation, storing, etc. of waste.