Biodiesel or Tallow?
Which is a better use of waste cooking oil and farmed animal residue, tallow for cosmetics and animal food or biodiesel?
This article features some of the pros and cons. I was surprised that the SF Green Party opposes the $15m proposed overhaul to produce biodiesel, stating "Biodiesel has high nitrogen oxide levels. Nitrogen oxide creates ozone that creates smog, and smog is really bad for human health." I suppose the next question is how do biodiesel's nitrogen oxide levels stack up next to more traditional fuels?
It seem that using the residue for tallow is equally environmentally friendly, since demand for cosmetics requires getting the needed resources from somewhere...