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Slums are neglected parts of cities where housing and living conditions are appallingly lacking. Slums range from high density, squalid central city tenements to spontaneous squatter settlements without legal recognition or rights, sprawling at the edge of cities. Slums do not have basic Municipal services like water, sanitation, waste collection, storm drainage, street lighting, paved foot paths or roads for emergency access. The National Slum policy aims to support the planned growth of urban areas in a manner that will help to upgrade all existing slums and informal settlements with due regard for the protection of the wider public interest. Chennai, one of the major metropolitan cities in India, facing the problems of mushrooming of slums and squatter settlements. Recognising the plight of the slum dwellers, the Government of Tamilnadu setup a separate organisation, namely Tamilnadu Slum Clearance Board in 1970. In the resettlement areas, the private sector or non-governmental organisations should be involved for additional inputs.