[Shotimes] emissions question

[Jeremy]

Luckily here in Nebraska we don't do emissions testing...but on the reports I've seen online, they do them by parts-per-million IIRC.
Although I guess that is a percentage, isnt it?
 
Regards,
 
Jeremy
 

van Oss <vanOss@centurytel.net> wrote:
I teach public speaking. A student gave a speech that has raised questions
about emissions testing. Please help. I live in a small city with no
testing. To those who live in an area with emissions testing:

Test results, and numbers required to pass, are all expressed in terms of
percentages, are they not? I mean, percentages as opposed to absolute
amounts of various compounds per mile? So a vehicle with a larger volume of
exhaust output might score well on percentages, but actually put out more
total volume of these compounds --- when compared with, say, a vehicle with
a smaller exhaust volume but percentage-wise "dirtier" emissions?

Any help appreciated.

VO
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