What is BIODIESEL?
It is a vegetal fuel that replaces the fossil gasoil. It is made from vegetal oils obtained from seeds, oily algae and plants.
Although it produces a 5% less of energy, its high lubricity balances this difference.
Its manufacture is simple too, and it does not require a great amount of money. As resultant it is obtain a subproduct known as Glicerol that is usually used in agriculture, medicine, cosmetics and nourishment.
Biodiesel does not degenerate so it can be storein an economical and simple way. It is 100% biodegradable. In less than 21 days its fingerprint dissappears. Its toxicity is minor than that of the salt.

If you want to know more about biodiesel............
http://www.veggievan.org/biodiesel/
http://www.biodiesel-intl.com/
http://usuarios.lycos.es/biodieseltr/hobbies8.html