1Dept. of Mechanical Engineering, Delhi College of Engineering, Delhi, India.
2G.B. Pant Govt. Engineering College, Okhla, New Delhi, India.
In this work a meticulous analysis of efficacy of CNG as a transportation fuel in the capital city of Delhi has been made. The deteriorating ambient air quality due to ever increasing vehicular emissions is the major reason for rating the capital city of Delhi as world's fourth most polluted city. The Supreme Court of India, concerned over the deteriorating air quality of Delhi mainly from vehicular sources, in a landmark judgment on 28th July 1998, directed that all the public transport vehicles in Delhi to run only on CNG after 31st March, 2001. Since then, efforts have been made to take Delhi out of this “most polluted” label. This order was implemented on subsequent and strong interventions of the Supreme Court of India. This paper discusses the administrative and practical difficulties in doing so and the benefits gained together with adverse effects of the introduction of CNG in the transportation system of Delhi in the last five years.
