Hybrid Cars Vs. Diesel.
I am not a giant fan of the gasoline/electric hybrid. The batteries are too expensive, the longevity of them is in question, there is the issue of what can be done with regard to recycling them and they throw off the balance of the car making them handle poorly.
My mid size gasoline powered car will take me 28 miles on one gallon of gasoline on the interstate. Compare that to a VW Passat TDI with a similar engine but powered by diesel will get 38-40. That means with the price of diesel fuel being $2.09 a gallon, around the corner from my home, you would pay .05 - .06 per mile of interstate driving. That would give you a range of (madly crunching numbers) 627 miles on its 16.5 gallon tank. Holy cow! You don't have to attach Doc Brown's Mr. Fusion to a Flux Capacitor in order to get outstanding fuel economy from a conventional car.
When I look at the current technologies out there that are being applied to automobiles I believe hydrogen fuel cell cars are going to be the ultimate zero emissions car. There are a few speed bumps in the way to making them available outside of California but those should be worked out over the next few years.
P.S. – Another benefit to owning a diesel engine is that a simple conversion can be done to make your car run on cooking oil. Think of it; you can run your car on the spent grease (after extensive filtering) from your favorite burger joint while your car emits the lovely smell of fries!
Disclaimer: I do not own VW stock or vehicles. I do have a copy of Herbie the Love Bug for the kids.
Tesla Roadster Test
Honda Clarity Test Drive (Hydrogen Fuel Cell Car)