We as passenger car drivers don't have a lobby in congress to represent us. None of us are shelling out money to representatives to draw their emphasis on going green elsewhere like planes, trucks, factories etc.
The only way that Cars are going to become more environmentally friendly is if it warranted by better performance. Better performance that is developed by car manufacturers for High end sports cars and race cars. Thats where all the best technology for cars from. Disc brakes were originally developed for racing because they didn't fade the way drum brakes did. Look now. they are practically standard. even run of the mill cars have disc brakes on the front two wheels which do most of the stopping. There is a trickle down effect of all car technology and the next best thing always comes from the top, not the bottom. You're not going to see sports cars being improved by taking aspects of shitty slow hybrids that look like rodents. You're going to see run of the mill cars being improved by advances in technology developed by high end car manufacturers.
In short. Until environmentally cars perform BETTER in a performance aspect, their environmental benefits won't become widespread enough to actually improve the environment. when the technology behind cars like the tesla roadster becomes cheap enough and practical enough to trickle down to a car like a camry.... thats when we'll see cars become efficient.
Sorry for the rant
This car is fully electric
YouTube - American Muscle VS Electric Drag Race White Zombie