Wikipedia is a good resource.
The arguements against alternative fuels such as hydrogen and ethanol is that more energy would be required to make the fuel than would be delivered once in the gas tank. According to wikipedia,
that's the case with gasoline.
Quote:
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Originally Posted by Wikipedia
....this reflects a lack of understanding of the motor fuel industry; production of gasoline also requires more energy input than the fuel itself provides, but the trade-off is worthwhile because it converts less portable forms of energy (electricity for pumps, burning off crude oil for heat at refineries, etc.) into a high-value (portable, easily used) form of energy. As of 2005, ethanol production has actually become much more energy-efficient than gasoline production, with energy inputs as low as 70% of the energy value of the ethanol produced.
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Wikipedia acknowledge's there is a dispute on whether or not it takes more energy to produce ethanol than it produces - it's debated here >
talk page.
The Costs to Produce Gasoline, Ethanol, Hydrogen...
