Takes more energy to produce bio-fuels than what you get out of it.
>> “Takes more energy to produce bio-fuels than what you get out of it.” <<
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That is an absolute fact!
It takes more than a gallon of real diesel oil to produce a gallon of ‘bio-fuel.’
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Depends. Biodiesel, e.g. from soybeans, produces 3.2 units of fuel for every unit of (fossil) fuel input, according to the USDA. A German study came up with a number of 2.5 to 1. That's still a pretty good deal.
Ethanol from corn barely breaks even. Don't tar all biofuel with the ethanol-from-corn brush. Ethanol from corn is only viable because it's subsidized by government.