Last November I wrote an article about the law in California (and now also Oregon) that is driving the expansion of the Darling Ingredients (DAR) and Valero Energy (VLO) renewable diesel joint venture Diamond Green Diesel [DGD]. That law, the Low Carbon Fuel Standard [LCFS], provides a large subsidy to low-carbon fuels that operates as a function of their carbon intensity, and that subsidy has contributed to the impressive profit margins that have been achieved by DGD. More recently, however, a changing dynamic in the national transportation fuel market is setting