US: Ethanol investments lacking long-term growth potential

Market Participant submits: In the first and second parts of this series on growth investing we looked at two elements that are hallmarks of a successful growth company:
1. The ability to grow turnover (sales generated by each unit of operating assets)
2. The ability to earn excess economic profits.
Using just these two ideas we can see that the ethanol industry is not a populated by growth companies.
http://energy.seekingalpha.com/article/14850