[asa] Re: short question on the environment stuff

As I guessed, CO2 is not part of emission standards of the past,
although I believe CA has started to require greenhouse gas standards
as well.
The 'problem' with CO2 is that it is proportional to the amount of
fuel burned, and I am not sure if CO2 can be dropped other than by
improving gas mileage.

See http://www.insightcentral.net/KB/compare/emissions.html for some
sample emission standard and the measurements/requirements for
hydro-carbons, NOx , CO and particulate matter.

See also wikipedia http://en.wikipedia.org/wiki/Emission_standard

Also http://www.autospies.com/news/Why-are-The-United-States-Emissions-Standards-so-Lax-10989/

Interesting viewpoint.

On 1/6/07, PvM <pvm.pandas@gmail.com> wrote:
> Good question. I believe that the emission controls affect mostly CO
> and NOX not CO2 emissions. Car emission standards were meant to reduce
> smog not necessarily the emission of greenhouse gases such as CO2.
> I need to do additional research to give you the full answer though
>
> On 1/6/07, Dawsonzhu@aol.com <Dawsonzhu@aol.com> wrote:
> > Hi,
> >
> > It is difficult to devote the time needed on researching
> > this. One question, that may have been in one of the
> > reports,
> >
> > We have had some emission controls on cars already, so
> > does that show up in any way in the data? But then, maybe
> > that is overwhelmed by economic growth elsewhere. Anyway,
> > I think Denver was much dirtier looking 30 years ago, and
> > the last time I was there, it looked much cleaner than
> > I remember it (for example). So emissions from cars (due
> > to regulation which our resident troll faithfully ignores)
> > probably have diminished since the early 70s. But whether
> > that is detectable in tree rings etc, I don't know.
> >
> > Anyway, if you know something on that, or you stumble on
> > it, or you've already posted it 20 times and I still have miss it,
> > please post it or let me know where to find it.
> >
> > WD
>

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Received on Sun Jan 7 00:08:50 2007