Turn back the clock to 2006, when Ford Motor Company announced it was taking flex-fuel vehicles seriously. That year, the company built 185,000 autos that could run on gasoline, ethanol or any combination of the two up to E85 (85 percent ethanol). Ford also pledged that the company's production of flex-fuel vehicles would double by 2010.

Flip forward to now and Ford is on target to meet its stated goal by year's end. 370,000 flex-fuel vehicles is nothing to sneeze at, but Ford shows no signs of stopping now. By 2012, the company hopes to offer flex-fuel capability on at least half of its vehicles. The one thing might stand in the way of meeting this goal is a lack of incentives. Ford admits that without government incentives for renewable fuel vehicles, producing them doesn't really make economical sense. Why does this appear to be the case across the board for alternative energy vehicles?

[Source: Green Car Reports]