Delhi, the capital city of India, which is the concern of this chapter, has its own significance as it is the seat of governance, learning, and the healthcare service provider. Capital cities though inhabit people from every region and tend to be overcrowded, but in Delhi, the situation is not only the nature of a capital city, but also the industrial and commercial centre of high order in the northern zone of India, which is creating a number of environmental problems, such as air and water pollution, slum development, congested housing, etc. The chapter discusses all causes of Delhi's environmental problems like atrophy of political will, mismanaged urbanisation, court interventions, etc., and finally, the chapter tries to find out possible solutions in a detailed manner keeping in view the measures taken by other countries like China to deal with such problems.