Squatting is the action of occupying an abandoned or unoccupied area of land or a building (usually residential) that the squatter does not own, rent or otherwise have lawful permission to use. The United Nations estimated in 2003 that there were one billion slum residents and squatters globally. Squatting is practiced worldwide, typically when people find empty buildings or land to occupy for housing.
In developing countries and least developed countries, shanty towns often begin as squatted settlements. In African cities such as Lagos, much of the population lives in slums. There are pavement dwellers in India and in Hong Kong as well as rooftop slums. Informal settlements in Latin America are known by names such as villa miseria (Argentina), pueblos jóvenes (Peru) and asentamientos irregulares (Guatemala, Uruguay). In Brazil, there are favelas in the major cities and land-based movements in rural areas.
