In article , Matt Barrow wrote:
It's much easier to convert the diesel infrastructure to use
non-crude oil based fuel than it is to move to a hydrogen economy.

Hmmm...a series of tests by the Univeristy of Colorado a few years ago
indicated the a HUGH proportion of pollution comes from diesels.

That's why there are strict emissions standards for diesel engines in
cars here. You can *see* the smoke from trucks in the US, typically the
~17 tonner fixed body four axle construction trucks which seemed to make
up 75% of the truck population in Houston. Every time they accelerated
there was a *thick* pall of black smoke. Those trucks wouldn't be
allowed on the roads here.

--
Dylan Smith, Castletown, Isle of Man
Flying: http://www.dylansmith.net
Frontier Elite Universe: http://www.alioth.net
"Maintain thine airspeed, lest the ground come up and smite thee"