How green is your car? Cars running on hyrocarbon based fuels are a major contributor of greenhouse gasses in the atmosphere. With the sustainability becoming a decision criteria of acquiring a car along with the other usual attributes like performance, asthetics, reliability etc, this solution provides a simple way of ascertaining the running carbon footprint of the car. The solution uses supervised machine learning approch to predict the carbon dioxide (CO2) emission in kg per mile of running of a vehicle in standard conditions. The solution uses vehicle's dimensions, transmission, manufactured year, gears, horsepower, drive etc. to predict the fuel consumption and the carbon emission of the vehicle.