Andy Hewitt [email hidden] opined the following...
Quoted message said:Actually, it's not impossible to eliminate emissions, it's just not cost
effective.
<pedant>
How do you eliminate emissions (Things that are emitted), without
turning off the engine?
</pedant>
Quoted message said:FWIW, catalysts are nothing more than a convenient way to reduce
emissions at a very localised level. However, we now have chemicals in
use that we *know* are poisonous/carcenogenic - i.e. benzine, instead of
the ones that simply *might* have been poisonous, but nobody had any
hard facts to prove - i.e. lead.
Lead has a dirty habit of accumulating in the body. Exposure to benzene
presents a short-term risk. It either has an effect or it doesn't.
Exposure to lead leads <he he> to a compound risk that increases with
exposure. Lead can also be found in other places (Water pipes of most of
Edinburgh) which were harder to deal with.
Quoted message said:It is in fact possible to produce a car that has emissions that are not
toxic without a cat fitted at all.
Hydrogen fuel cells? Switching from fossil fuels does seem to be a good
way to do it. The byproducts of alcohol combustion are far less nasty
than those of petrochemicals.
Quoted message said:I have a bit of knowledge of Honda cars, and IMHO they are the pinnacle
of engine design, and have some of the cleanest engines around.In 1972 they designed, and used in mass production an engine (CVCC) that
produced emissions to exceed the Californian regulations of the time. It
didn't have a cat fitted.In 1991 they produced a derivative of the VTEC engine (VTEC-E) that
produced gasses that were cleaner than *any* other car with a cat
fitted. Indeed, the EU regulations that followed meant they had to fit a
cat, which actually *increased* the poisonous emissions from this
engine.
Anything to declare sir?
I did once hear a dirty rumour that the patents on a number of
alternative power systems for cars were held by the likes of BP (Now
incidentally... Beyond Petroleum). I'd love to dismiss it as a
conspiracy theory, but it just seems too likely.
Jon