FAVELAS, named after the Brazilian creeping plant ’favela’ have existed in Brazil since the late 19th century. Wretched areas of closely packed dwellings were planted in the cities, on the outskirts of the cities, and continued to spread rampantly, growing out of all control. The problem became worse around 1950 when the industrialization of Brazil led to mass migration from rural areas to the big cities. At first the municipal administration tried to resolve this problem by building social housing. Some of the favelas were bulldozed and their inhabitants were forced to resettle elsewhere. But areas of informal settlements have continued to grow. According to the Secretaria Municipal de Habitação the slum’s residents are already 22% of the population in Rio.