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"Engine emissions researchers at Southwest Research Institute (SwRI) in San Antonio, Texas, are forming a consortium to examine how technologies aimed at reducing oxides of nitrogen (NOx) from diesel engines affect the emissions of particulate matter (PM).  Titled, &amp;amp;quot;The Effect of Emission Control Technologies on the Chemical and  Physical Properties of Diesel Particulate,&amp;amp;quot; the new consortium will research  the impact of various current as well as novel NOx and PM control technologies  on the chemical and physical characteristics of particles emitted from diesels."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.just-auto.com/news/consortium-examines-how-emission-controls-affect-particulate-matter_id79279.aspx>