Dave Plowman (News) wrote:
In article ,
PC Paul wrote:
Modern cars actually clean up the air they burn in terms of
pollutants. The only significant emission is CO2. And water, of
course.

Not quite yet - some new cars do manage this, in a dense city
environment their emissions *are* cleaner than the ambient air. But
only when brand new. And only in polluted air in the first place.

Phew. Saves me looking through back numbers of Autocar.

It's a good start though.

I'm not sure about the bit of only doing this while new, as there are
fixed dates for degrees of emissions which are tested at MOT time, and
these will undoubtedly be tightened in future years (for then new
cars). So a car has to be very close to its original spec, emissions
wise, regardless of its mileage and therefore wear, to pass.

Can't (be arsed to) find the quote about 'when they leave the factory' again
now, but it was from a GM pressdroid, so I assumed he was putting the best
spin on it, and/or covering himself.