Advancements in materials and speed will be made simultaneously and additive manufacturing will become a brilliantly useful industrial tool.

FORBES: 3D Printing Doesn't Live Up To The Hype Yet

The additive made up 11% of California gasoline by volume, but only half that volume can be replaced by ethanol, forcing refiners to produce an extra 100, 000 bbl. a day of gas to meet demand.

FORBES: $2 Gas? We Love It

Watkins says the rest of his fortune lies in ethanol, a fuel additive usually made from corn.

FORBES: Show Me the Money