With the latest advances in Bio-fuels, the worries over the declining supply of oil in the world should disappear. So why isn't use more widespread? A dramatic switch to biofuels would be too disruptive to world markets, for both the oil trade and the trade of the organic materials used in the fuels. Cost is also a factor, coming in at approximately $3 per gallon to the consumer. However, it is comforting to know that an oil crisis would not be crippling.