(This article was originally published on December 28, 2014) MUMBAI: The number of vehicles using compressed natural gas (CNG) in the Mumbai region has surged by more than 200% since 2011, according to data released by Mahanagar Gas LTD. CNG-equipped vehicles account for about 30% of all vehicles. There are 4.05 lakh Vehicles in the metropolitan area Vehicles using CNG. Although the specialty store was established around 12 years ago, for CNG, the demand for powered vehicles has increased over the past four years. Data shows that 38,700 cars were converted to CNG in 2011-12 and the number almost doubled to 790,000 in the next fiscal. An MGL spokesperson said that in 2013, the number of vehicles increased by 1.2 lakh between 2011 and 2014, a record increase in vehicles in nearly a decade. Green fuel is cheaper (43.455 kilograms per kilogram Rs 68.86 per kilogram Rs.) liters of petrol), provides better mileage and reduces harmful emissions. Rajesh Jayaram recently installed CNG in his ca...