Biofuels like ethanol and biodiesel are already available, so why would they show up on our list of future technologies? A one-word answer: cellulose.

Currently, mass-produced ethanol is created by the fermentation of sugar and in the U.S. granulated corn is distilled to make alcohol and combined with gasoline to make E85. Unfortunately, corn is a poor choice when it comes to the creation of ethanol. Alternatives are on the horizon, though, which could potentially make biofuels a much better choice. Cellulosic ethanol could be considered ethanol version 2.0, with large-scale plants currently being set-up which might be able to offer the fuel at very low prices. When the fact that American roadways are already littered with E85-capable vehicles is added into the mix, cellulosic ethanol stands to make a large dent in our petroleum usage.

Discover Number 2.

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