fuel efficency

By reading this infirmation I come to understand taht myc ar uses to much enegy and it should be less because that meanse it need to fuel up more often. I also believe taht the governement doesn;'t let really effective cars come out because they want people to buy fuel so that the econmy increases and tehy get richer. Walking and bike take syou less energy and less time. tehrefore if you really have to get soemwhere you should use a car and if not a bike. The contamination an golbal warming are caused by non efficient cars.I think taht by the time i buy my own car there will be somethuing different that is not fuel and the cars will be more efficient. Also yes we should look at more efficient cars because that way we can save more moeny and energy.