I agree with your sentiment. But I think it is irresponsible to (basically)
tell people that it's OK to run your car in the garage with the door shut
because the emissions are virtually zero. Did you read the link I posted
earlier, which contained a very revealing analysis of the amount of CO
produced by a car started in an enclosed garage? It does not support your
position that this is a negligible risk.

"Richard J Kinch" wrote in message
. ..
The risk should never be understated.

I disagree. That philosophy leads to those user manuals that start with
10
pages of warnings that nobody reads. Rear-view mirrors that warn you
about
things appearing smaller. Caution should be proportioned to risk. Cf the
boy who cried wolf. Probability, hazards, and risks are about the hardest
intellectual concepts going; we ought not to be burdening people with any
more than they need.