Allegedly Volkswagen cheated to both governments and lusers

[Cathal (Phone)]

IIRC NOx is also a strong greenhouse gas, stronger than CO2 by a good factor. Shorter halflife, but if it helps bump AGW to tipping points then halflives don't matter anymore.

On 27 September 2015 18:44:00 IST, jim bell <jdb10987 at yahoo.com> wrote:
>  From: Georgi Guninski <guninski at guninski.com>
>http://www.theregister.co.uk/2015/09/25/vw_pollution_just_the_tip_of_the_iceberg_whos_to_blame_you_guessed_it_hippies/
>
>><quote>
>>Volkswagen is being rightly condemned from all directions, as its
>>methods were particularly cynical: its engine software would sense
>when
>>the car was in a test environment and cut back NO_x output
>temporarily.
>
>>As soon as the car was no longer under test, the car would change mode
>>and emit huge amounts of NO_x. This wasn't done for no reason – if a
>>machine is allowed to generate NO_x freely, it can be very
>>fuel-efficient – and thus, of course, its carbon emissions can be very
>>low too.
>
>I noticed that (at least!) one media report portrayed this as making
>VW's less "green".  But from another report, I saw that they had 10%
>greater gas mileage if they were allowed to cheat.  (In other words,
>less CO2 emissions per mile.)  Now, the above quote refers to "huge
>amounts" of NOx.  (nitrogen oxides, probably NO and NO2).  The question
>is, for those people who complain about CO2 being a greenhouse gas,
>what is the relative undesireability of extra CO2 versus extra NOx.
> Relative harm, and all that.  Which is a concept that people who call
>themselves "environmentalists" seem to have a great deal of difficulty
>with.
>This also raises an idea:  I've never heard of this, but what would be
>wrong with allowing differences in emissions based on location?
> Putting a GPS in a car is trivial today.  Producing less NOx inside a
>city would make sense; producing less NOx while on a cross-country
>road-trip less so.                    Jim Bell

-- 
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