qtiger,

Yeah, diesel is said to produce emissions that cause cancer. But then again, everything does...?

These are also scores of relatively low tech diesel. In Europe they use low-sulfur diesel, a blend not common in the US. Economically speaking, there isn't much demand for diesel in the US until recently. The majority of the non-commercial diesel customers drive trucks - I highly doubt they're interested in emissions numbers.

I think the mentality of americans should be slightly adjusted so that it is maybe not desired, but at least accepted. We are far from that thanks to GM.