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Today biofuels represent a way of producing transportation fuels that are progressively carbon neutral, but often use the food part of crops as their basic feedstock. In the US 40% of the corn harvest is turned into ethanol by distilling the fermented corn mash. In the future we have answers to this challenge via using the plant part of the corn or sugar cane instead of the food part but for now we are restricted to doing our best to turn cellulose into biofuels with inefficient technologies. Innovation is also rampant in this arena with technologies today that can combine the C carbon, H hydrogen and O oxygen found in water and air to make hydrocarbons but still at high price. There is no question that the experience curve will cut prices, but that existing production methods are already cheaper when you take into account the carbon neutral potential of these fuels.