Second, truly independent studies on ethanol, such as those written by Tad Patzek of Berkeley and David Pimentel of Cornell, show that ethanol is a net energy loser.

• 其次，真正独立的研究显示，乙醇根本就是种一无是处的能源，提交此类研究结论的包括有加州大学伯克莱分校的TadPatzek和康奈尔大学的DavidPimentel；