One of the more unusual stories to emerge from the motor industry in 2006 was that the all-American 4x4 Jeep Wrangler is the world’s greenest car. ... CNW Marketing Research argues their dust-to-dust yardstick measures the environmental impact of a vehicle from the date of its manufacturer to the date it is scrapped. It takes in not just the car’s fuel consumption and CO2 emissions but also the energy used in its design and production both in car assembly plants and by suppliers of parts and sub-assemblies. The energy used in transporting cars to dealers and in maintaining, servicing and scrapping and recycling them is also taken into account.