A study which clearly is obviously tainted avers that a specific biodiesel generates far less carbon emissions over the entire lifecycle from inception of production through actual use as a propellant.
It looks like the study is most probably biased, but the results are such that it is extremely unlikely that bias alone could account for them.
The lifecycle carbon emissions of renewable diesel fuel are significantly lower than those of conventional diesel, says a new study from a company that sells the renewable version.
From the same source:
Neste found that the overall carbon-dioxide emissions for its renewable diesel averaged 10 grams per kilometer, compared to 100g per km for conventional diesel.
Most importantly,
Neste also claims NEXBTL isn't limited by the "blend wall" that limits the quantities of other types of biofuels that can be blended with petroleum products.
That is important because most diesel cars are only certified for 5% biodiesel, and trucks range from there up to some being certified for 20% biodiesel.
We, the ordinary people, are going to have to be the ones carrying the fight against global warming, so this is something worth following up on as we transition toward a renewable low carbon lifestyle.