Problems with shanty towns, favela, slum, bustee

The favelas are units of irregular self-constructed housing that are occupied illegally. They are usually on lands belonging to third parties, and most often located around the edge of the cities, often crowded onto hillsides. Residences are built without permission or a license and are often disorganised, without numbered streets, sanitation networks, electricity, a telephone service or plumbing. In recent years favelas have been troubled by drug-related crime and gang warfare.