The National Capital Territory (NCT) of Delhi has seen rapid growth in its industrial, transportation, and housing sectors over the past decades. The population of Delhi has increased from 1.378 crore in 2001 to 1.678 crore in 2011, a decadal growth of 21.2% against a national growth rate of 17.7%. This rapid growth in population, along with the increased rate of industrialization and urbanization and the rise in motorized transport, have resulted in an increased concentration of various air pollutants such as nitrogen oxides, sulphur dioxide, suspended particulate matter, respirable suspended particulate matter, carbon monoxide, ozone, lead, benzene, hydrocarbons, etc. With rising concerns about the steep increase in air pollution in the National Capital Territory of Delhi, several factors particularly motorized transportation, construction, and stubble burning in neighboring states are being identified as contributing to this hazard.The present book includes Air Pollution impacts and control measures, Air Pollution in Mega City-Delhi NCR, understanding towards Delhi's complex Air Pollution Problem and their sources, impact of urbanization on Air Pollution in Asian Cities, Impacts of Air Pollution on the ecosystem and human health, Indoor Air Pollution sources, impact on health & remediation, recent trends in the control and improvement of Indoor Air Quality, regional and global level environmental problems of Air Pollution.