The common term for such vehicles is "gross polluter". Here's a study on them (p...

		chiph on May 7, 2015 \| parent \| context \| favorite \| on: 25% of Cars Cause 90% of Automobile Air Pollution The common term for such vehicles is "gross polluter". Here's a study on them (pdf warning) http://www.csus.edu/indiv/s/shafizadehk/pubs/UT2004.pdf