Well, plants take carbon from the atmosphere--greenhouse gases--and convert that carbon into hydrocarbons that we can use. That's why it becomes carbon neutral; we are actually not taking any fossil fuels from the ground and converting them to that.
What you're looking at is producing as much usable hydrocarbons on an acre of land with minimal costs and minimal amount of environmental footprint. By being able to reduce fertilizer requirements, reduce water use, reduce equipment time--with fewer passes in the field with the tractor, you're able to save on fuels--you're really looking at some significant benefits in terms of overall greenhouse gas savings.
As part of the SDTC funding that we have, we are actually quantifying that sustainability index. All governments are now looking at renewable fuels as having to have a life cycle analysis that demonstrates that indeed they provide a greenhouse gas benefit. I can tell you right now that corn ethanol does not, whereas an oil-based crop, such as biodiesel, does actually have the greenhouse gas benefits to allow it to claim that.