nasa vs diesel soot

[David_VT]

Another hit against our favorite fueled engines... .



http://www.nytimes.com/2003/12/25/national/25SOOT.html

 

[wxman]

In spite of what the NASA author said in this science brief ("The largest source of soot in developed countries is now diesel fuel"), there are several recent studies that suggest that on-road diesels are actually responsible for a relatively small percentage of the PM inventory:



"... the NFRAQS [Northern Front Range Air Quality Study] work indicated that light-duty gasoline vehicles contributed about 60% of the PM2. 5 carbon measured at urban Denver sites and that these contributions were 2. 5-3. 0 times those from diesel... . " (source: DOE)



Another very recent DOE study (published in the Journal of the Air & Waste Management Association in July 2003) concludes that on-road diesel emissions in the Southern California Air Basin (SoCAB) are responsible for less than 24% (8. 1 tons/day) of the total on-road PM10 emissions (33. 8 tons/day) - and that's a small percentage of the TOTAL anthropogenic PM emissions (360 tons per day). So, even if you remove ALL on-road diesels, the PM reduction would be almost trivial.



It appears this study is perpetuating a very questionable assumption that diesel engines are the source of most "soot".

 

[bmoeller]

Just wait for 1 valcanic eruption. ANY man made emissions won't mean squat.

 

[David_VT]

TDR as pro diesel lobby

Hey, another value added opportunity for the TDR leadership. . ... .



Funding a pro diesel lobby



:-{}

 

[Will24]

Another wonderful NY times article