The steel in tankers or pileplines is not relevant to the production of ethanol which is why it's not considered. Neither is the amount of oil consumed in producing oil relevant to ethanol. Ethanol has to prove itself sustainable (have a positive energy balance) before it can be compared to oil, otherwise you're just consuming oil to make ethanol...
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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