A woman steps out of her home in Kibera. The ground in much of Kibera is made up of of refuse and rubbish. Houses are often constructed on top of this unstable ground and therefore many structures collapse whenever the slum experiences flooding, which it does regularly. Over 25 percent of Nairobi's population live in Kibera, an area that covers less than one percent of the city. Although the population of the slum is over one million, it is recognised officially as a 'squat', or illegally occupied land, which allows the government to ignore the basic needs of the inhabitants.