Maruti Suzuki is going green with every new launch and does take the pollution problem quite seriously since it has already announced the launch of 5 Maruti CNG cars on a single day including Wagon-R CNG, SX4 CNG, Alto CNG, EECO CNG and Zen Estilo CNG and is has re-launched the Wagon-R Duo. Maruti Wagon-R Duo version is the only offering from the company which could run on LPG as well as Petrol depending on your preference and situation. The Duo was discontinued just before the company launched the new model of the Wagon-R.