[llamabeast]

Max, the point is that burning fossil fuels causes a net increase in CO2 in the atmosphere. With biofuels and all their derivatives, by contrast, the carbon came from the atmosphere very recently, when it was made, so burning it only puts you back where you started.

The two are basically interchangeable, _except_ for the fact that there's no way you're going to synthesis fuel and pump it underground. So, the more we replace fossil fuel usage with biofuel usage, the less the atmospheric CO2 will increase.