52_100_Lecture_11_1_07 - Disadvantages of Ethanol The...

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10/31/2007 1 Disadvantages of Ethanol The energy to produce ethanol is greater than the energy the is produced form burning ethanol. E l i t D id Pi t l f C ll U i it Ecologist David Pimentel of Cornell University Geo-engineer Tad Patzek of the University of California at Berkeley Pimentel’s Findings 1. An acre of U.S. corn yields about 7,110 lbs for processing into 328 gallons of ethanol. 2. Energy economics gets worse at the processing plant BTU – British Thermal Unit – unit of energy
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10/31/2007 2 Pimentel’s Findings 3. Ethanol from corn costs about $1.74 per gallon, while production of a gallon of gasoline is $0.95. 4. Most economic analysis of corn-to-ethanol production overlook the cost of environmental damages. Pimentel’s Findings 5. Approximately $1 billion a year in current federal and state susidies for ethanol production 6. The average U.S. automobile travels 10,000 miles a year. If it used pure ethanol
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