Biodiesel, NOx and the value of environmental “prices”
VW's clean TDI technology could let biodiesel users avoid any increase in NOx emissions. This weekend I was checking out my friend Dave's new VW Jetta, emblazoned with biodiesel stickers, as he told me how switching to biodiesel had lowered his carbon emissions 80%. (Biodiesel is based on biogenic carbon -- the carbon emitted when you drive was absorbed by… read more →




