Truck diesels clean up greatly in last 5 years

Obviously, this engineering work started some years ago - in an era of 45 minute news cycles, we tend to forget that progress comes incrementally over periods of years, but it does come.

Anyone considering an alternative fueled vehicle should include diesel in their calculations. If your regular gas a station has a diesel pump (many do), then it may be a better alternative than a hybrid. If you have a bio-diesel station near your regular route, then it is almost a no-brainer.

Truck diesels clean up even more than those in cars | Green Blog & Discussion at Automobile Magazine:
"Heavy trucks and buses could lose their image as stinky, soot-spewing monsters as the current fleet is replaced with today’s cleaner models. According to recently released data from the Advanced Collaborative Emissions Study, overseen by the Health Effect Institute, shows that the engines (from Caterpillar, Detroit Diesel, Volvo, and Cummins) had an overall average 90 percent reduction in exhaust pollutants from 2004 to 2007. Particulate matter—soot—was cut by 99 percent. Even smog-forming nitrous oxides, typically the most difficult to control of diesel exhaust emissions, were 70 percent lower."