preferably, hydrogen fuel cell vehicles is my choice...improvised cars nowadays are quite tempting, but somehow the cost takes a larger barrier..but Americans will surely opt for this..a lot of cars are improved with added features as well as getting into the way of making hydrogen fuel cell vehicles..h0pe subaru was one of them, since they had already proposed hybrid cars..with my subaru, i had done maintenance on it and a regular check on its parts (ex:subaru engine, subaru exhaust, bumper,..)