>That's what the "partially zero" means - they have zero evaporative emissions. Except it doesn't mean "partial zero." Instead, it refers to a "partial ZEV" (i

>That's what the "partially zero" means - they have zero evaporative emissions. Except it doesn't mean "partial zero." Instead, it refers to a "partial ZEV" (ie a partial vehicle). The argument is that having a greater number of lower-emission vehicles[1] on the road has the same effect on air pollution as having a smaller number of zero-emission vehicles. So if those vehicles count as a partial ZEVs (for the purposes of the CARB ZEV Mandate), the same overall policy effect would be achieved. [1] as you point out, legally they defined this as meeting the EPA SULEV emission requirements, plus having zero evaporative emissions