Kolkata is one of the most polluted cities of the world. The city has been plagued by one of the most prominent pollution problems of the of the world, the air pollution. The time period of 2000-2008 saw a huge number of vehicles hitting Kolkata’s streets, which has lead to a significant increase in air pollution. Realising this, the Supreme Court has decided to impose a ban on the vehicles, which are more than 15-year old. The ban was imposed finally on 1 st August, 2009.