In a lot of European center city areas you can't breathe because of the high
concentration of diesel fumes. Diesel particulates accumulate in the lungs.
Removing the sulphur from the fuel will help some, but it's still a dirty
engine. The few car makers who do a good job with diesels use very expensive
catalysts. For large trucks particulate trapping equipment is being
developed.
Subaru wants you to think they are concerned about the environment and they
tout their low emission engines.
And to think, our kids ride in diesel stinking school buses that idle in
front of the bus loading areas.
At our offices we have the UPS and Purolater diesel trucks idling at our
doors while they deliver and pickup packages.
On the petroleum food chain, diesel is just a less refined fuel than
gasoline. The diesel engine has been around a long time and was a good idea
for days gone by. It's still okay for applications removed from population
concentrations i.e. ships, tugboats, military trucks, and long haul
locomotives. But choking our freeways, suburbia, and center cities with
large numbers of these vehicles is not really healthy. Imagine Manahattan
with all diesel taxicabs on a windless summer day!!
New Class 8 long haul diesel trucks will have to meet new emission
regulations to try to stem the soot. The problem is the enormous fleet of
older trucks that belch plumes of black sooty smoke as they take off from a
standstill.
We need to improve and refine our hybrid technology. You can get a lot of
instant torque from an electric motor. Feel a subway accelerate and realize
how much weight is being moved quickly. Honda is proving that electric motor
assist to the gasoline engine is one hot way to accelerate while minimizing
pollution!