Unintended consequences: potential downsides of the Air Force's conversion to biofuels

Additionally, future fuel supplies and storage systems may experience troublesome fouling due to the more biologically reactive nature of alternative fuels. [...] prudence demands that the Air Force use the most current research and actively support new research to understand the implications of accelerated use of biofuels, ineluding environmental and other risks associated with spills and impairment of the systems that transport, store, and consume these fuels. [...] occurring underground (i.e., subsurface) bacteria can transform hydrocarbon contaminants such as benzene, toluene, ethylbenzene, and xylene isomers (BTEX) and their breakdown products such as methane into harmless substances.