Pakistani manufactured, The Alif Car (Transmission Motor Company, TMC of Karachi, Pakistan) is a $2,200 car, emitting the lowest CO2/km emission.. less than 100g CO2/km !!! That's less than the Toyota Prius, which btw is a Hybrid.
This "beauty" has a 4-stroke (Chinese) engine, with a built-in 4-speed transmission. The compressed natural gas (CNG) version is supposedly a huge hit, but I am yet to hear anyone who has seen this car on the streets of Karachi.