Poor urban planning and management of cities and towns, large influx of people from rural areas to urban areas in search of jobs and opportunities, and the lack of affordable housing are the main factors which can be seen to lead to the growth and presence of settlements often referred to as slums. Slums are overcrowded settlements, often marked by a lack of basic amenities and tenure security. From time to time, the state re-settles slum dwellers, either in slums re-developed in situ or in tenements that are often in the peripheries of the city.