Megacities like Delhi have expanded in an unprecedented way. This expansion is fraught with a number of challenges which pose questions on the planning and sustainability of urban areas. This paper high lights some of these challenges in case of Delhi Metropolitan region. The paper first provides a historical over view of Delhi planning and discuses some of the administrative social-economic challenges that exist in implementing the planned measures. While these challenges are being dealt, there have been a number of initiatives that have been taken to improve the overall quality of living in the city. The paper provides an overview on few of these initiatives related to public transport, air pollution, urban greenery, energy supply, housing and climate change

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