The European Union biofuels directive requires a minimum level of biofuels as a proportion of fuels sold in the European Union of 2% by 2005, 5.75% by 2010 and 20% by 2020? The main green fuels will be ethanol and biodiesel, and demand for biodiesel is expected to be up to 10.5 billion litres just in European countries by 2010.

Biodiesel will run in any diesel engine unmodified? Biodiesel is a solvent, so if you put it in an old tank or use it with a diesel engine that has been running regular diesel, it may clean and dissolve some "residues" and then the residues will clog your fuel filter. Changing the filter often when you first start using biodiesel usually fixes this problem.

The only other problem you might have is with rubber gaskets and hoses in vehicles made prior to 1992. The biodiesel may degrade these types of rubber and they may need replacing after a while. Newer engines have been modified to stand up to the newer blends of diesel fuel that have been in use since 1992 and these engines will work fine with biodiesel.