Eco-friendly cars have arrived in the market with much fanfare. The global warming fashion is used as the selling point for these new cars which consume bio fuel, and produce fewer CO2 emissions than diesel or gasoline engines.
Yet, these cars are falsely eco-friendly. While their emissions may be lower, their fuel is more energy-consuming to produce than traditional diesel or gasoline.
The amount of energy required to produce 1 horsepower out of a bio-diesel car engine is greater, and more pollutant, than the energy required to produce 1 horsepower out of a regular diesel or gasoline car engine.
Bio-fuels (whether ethanol or bio-diesel) themselves require more energy to produce than the energy obtained out of them. These types of fuel are obtained from vegetable oils, which in turn come from crops, which require more energy to plant, grow, collect and process.
On the other hand, fossil fuels yield much more energy than they require to obtain, extract and process.
In summary, using bio-fuels is more harmful for the environment than using fossil fuels, because it is necessary to consume more energy (from the environment) to produce bio-fuels than they yield.
Of course, bio-fuels are viable only thanks to government subsidies. In other words, governments around the world are wasting public money to sustain a new industry (bio-fuels and related technologies) with the hope that bio fuel will help reduce global warming.
On the other hand, real innovation in eco-friendliness has come only from gasoline-electric hybrid cars: They can re-utilize part of the energy they produce to feed it back to the engine. Real energy savings can be achieved in this way, as the car reuses part of the energy it consumes, instead of requiring a continuous intake of external energy, as regular gasoline/diesel, or bio fuel cars do.
Bio-fuel cars are the latest hype in the climate-change doctrine, provide no advantage, and represent a waste of tax payers’ money, to benefit a few companies while providing governments with great propaganda to present themselves as Earth-saviors.
The problem is: Earth does not really have a problem, and needs no lying guardian.
[EDITED 2007-10-20: Sources and more data added in comments. See below]