There's a lot of interest in electric cars these days. The Toyota Prius has been a huge success and both Chevy and Nissan are poised to come out with their own versions.
I think that diesel is a good idea. Diesel engines are torque monsters, even the smaller ones, which is why they are such a good idea in farm tractors and large trucks. You need torque if you're turning a generator to charge batteries, or the torque from the engine can directly drive the motors.
The leader in hybrid technology has been the railroad industry. These behemoths combine a diesel engine and electric motors and move freight very efficiently. I think that the motor companies missed an opportunity several years ago. A full-size pickup with a diesel engine and electric drive motors should he a very efficient vehicle, with enough "green" credentials to make even the most ardent environmentalist happy.
Oh, and people who buy straight electric vehicles are going to be plenty pissed off when the learn that their cars are (in fact), coal powered. Where do they think the electricity comes from?