Here is a great article that looks at the recent 24 Hours Of Le Mans race won by an Audi car that ran on Biodiesel. This is a huge step in the right direction in both the use of alternative fuels as well as the promotion of the use of alternative fuels. In reality, the use of biofuels in racing will not improve the environment a great deal... but the attention it brings can lead others to go in that direction too.