Of course one day the traditional internal-combustion engine running on petrol or diesel will have to be replaced with something environmentally friendly. But I pray that this day will come only when I'm in my late 50's when I have had enough adrenaline rushes from hitting the accellerator on a petrol car. And imagine how these cars are gonna sound like!!! I bet it'll be a high pitched whining. COME ON! I wan't a nice sounding car with decent performance. On the other hand it's a great step in the right direction and tuning companies better concentrate on hydrogen engines in the future...or I'm gonna start riding my bicycle!!!