Explanations:Compressed Natural Gas (CNG) is a cleaner alternative to conventional fuels like diesel and petrol. It is primarily composed of methane and is compressed to a high pressure to make it more efficient for storage and transportation. CNG is widely used in transport vehicles because it produces fewer emissions compared to diesel and petrol, making it a more environmentally friendly option.
Delhi, the capital city of India, has been a pioneer in the adoption of CNG for transport vehicles. The city faced severe air pollution issues in the 1990s and early 2000s, leading to a significant push towards cleaner fuels. In 1998, the Supreme Court of India ordered the conversion of all public transport vehicles in Delhi to CNG. This decision was part of a broader strategy to reduce air pollution and improve the overall air quality in the city.
The adoption of CNG in Delhi has been one of the largest and most successful initiatives of its kind in the world. It has led to a significant reduction in air pollution levels, particularly in terms of particulate matter and other harmful emissions. The success of this initiative in Delhi has inspired other cities in India and around the world to consider similar measures to improve air quality.
While other cities in India, such as Mumbai, Kolkata, and Chennai, have also taken steps to reduce air pollution and promote the use of cleaner fuels, the scale and impact of the CNG initiative in Delhi have been unparalleled. This makes Delhi the city most associated with the widespread use of CNG in transport vehicles.