renewable energies

The cost (monetary and energy expenditure) of bio-diesel and E85 is about 25% above that of petroleum based fuel sources. We’re already seeing a rise in cost for corn, soy, and sunflower containing products. Do you really think that these bio fuels are the answer, or is it possible to come up with a more [...]

I have a Mercedes E270 Diesel and my father a Saab 95 2.2 diesel. We both are horrified by the price of fuel and want to reduce our costs whilst reducing our emissions.
I have tried to contact bio-diesel companies but all I get is how to make bio-diesel as opposed to whether i can run [...]