Petrol and diesel vehicles pollute envirement by releasing harmfull gases like Nitrus Oxide, Carbon Monoxide, Carbon Dioxide and Hydro Carbons. These gases are responsible for thousands of premature deaths around the world and effect other living things. Majority of people convert their cars to CNG for financial reasons, it is worth remembering that you are also giving your contribution towards working for a clean & Green Environment. CNG converted cars have lower Nitrus Oxide, Carbon Monoxide, Carbon Dioxide and Hydro Carbons, which are the four major pollutants in exhaust fumes. Even if the environmental side of CNG is not what makes you convert your car, it is a great sweetener when you see the little CNG light on your dashboard go green that you know you are doing the same, and saving a fortune.