I can't understand why most North American environmentally friendly vehicles are hybrids. Aside from the new Jeep 3.0 CRD, there are few diesels out there - and they really do get mileage, efficiency, and yes - even greenhouse emmisions.
And then what about alternate fuels like hyrdogen, etc. I know they aren't mainstream yet, but it sure would be nice to see some more development in that direction.
VW TDIs are back next year I believe.
MB has Bluetec versions across the line, but you'll pay up front and at the service dept.

I wish VW/Audi would bring more of their diesels over. An A4 TDI Quattro would be very tempting for me.