partial-zero
 n.— « It’s also an emissions champ, designated an Advanced Technology Partial-Zero Emission Vehicle (AT-PZEV) by the California regulators. The bottom line is that in addition to having a tailpipe as clean as the Prius (“partial zero” translates as a 97 percent reduction in hydrocarbons and nitrogen oxides over the average 2005 car).» —“An Olive Branch” by Jim Motavalli E Magazine July 27, 2005. (source: Double-Tongued Dictionary)

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