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It depends on the scope of the question. Taken at face value, the answer is yes. It is possible to drive today's "flex-fuel" vehicles entirely on E85, making E85 the vehicle's "primary energy source".
On a broader scale, you have to determine the viability of ethanol for widespread adoption. There have been studies to determine the full-cycle energy tradeoffs in producing and using ethanol as a transport fuel, and the results don't look very good. Certainly not the way it's being produced in the US today, which is from possibly the poorest feedstock imaginable -- corn. There have been two major studies of this process of which I'm aware; one claimed a higher total energy expenditure in producing the ethanol than the energy it ultimately contains -- that's right, you burn more fossil fuel to produce a quantity of ethanol than what you get out of it, so you couldn't, for example, power the whole process with ethanol. The result is that by producing and using ethanol, you've increased the need for coal and imported oil. Another subsequent study indicated a higher output energy content, but not by enough to make the venture worthwhile.
Ethanol today is primarily promoted by ADM, GM marketing, heavily subsidized farmers and politicians. It is finding diminishing favor by anyone who's actually looked at the numbers.
What else can I help you with?
What is the energy source of ethanol?
The energy source of ethanol is renewable plant material, such as corn, sugar cane, or cellulose from wood or grasses. This plant material undergoes fermentation to produce ethanol, which can be used as a fuel source.
Why Have fossil become our primary energy source?
Fossils have become our primary energy source due to their abundance, high energy density, and relatively low cost of extraction. Over time, human civilization has developed technologies that rely on burning fossil fuels to generate heat and electricity, making them the most widespread energy source today.
Is are the body primary and immediate source of energy?
Carbohydrates are the body's primary and immediate source of energy.
What is a major drawback of ethanol?
Two drinks and I have to get a taxi home. As an energy source, the process of concentrating ethanol consumes a lot of energy. It depends on who you believe, but the amount of energy consumed may exceed the amount of energy in the ethanol created. If that's so, then ethanol may be a useful form of energy (in the same was as electricity is), but not a useful source of energy.
Is electricity a clean source of energy?
The term clean source of energy refers to only primary energy sources as wind or solar energy. Electricity, by definition, is not a primary energy source. It is a secondary energy source that is could be produced by a clean energy source as wind or any renewable primary energy source or produced by fossil energy source as oil, natural gas, or coal.
Are the main source of energy?
Carbohydrates are the primary energy source for herbivores (cows, horses, etc.). Proteins are the primary energy source for carnivores (dogs, cats, etc.).
Are the body's primary and immediate source of energy?
Carbohydrates are the body's primary and immediate source of energy.
What are the sources pf energy and thus growth for animals?
The sun is the initial (primary) energy source for life. Ingestion and digestion of a food source is an animal's primary source of energy.
What is earth energy source?
The primary is the sun
What is the primary source of energy?
the sun
What is the primary source is energy?
the sun
What is the first source of energy ever discovered?
Wood is the first discovered primary energy source. Some believe that Solar energy (as heat caused by sun light) is the first discovered primary energy source.
