From the Northern Star in northern NSW, Australia:
"BEEF and mutton fat is helping to keep 100 of Ballina Shire Council’s diesel-fuelled vehicles on the road.
Combined with soy beans and conventional diesel, the by-products of Australia’s meat processing industry are used in a new fuel called B20.
Ballina is the first council in the Northern Rivers to use biodiesel in its fleet."
It costs 3 to 4 cents a litre more than regular diesel, and we do not know how many litres they are using and therefore the cost of the reductions. But this is an interesting development away from the major cities.