The UK's first train to run on biodiesel is going into service (link below.)
http://news.bbc.co.uk/1/hi/uk/6729115.stm

The Virgin Voyager has been modified to run on eco-friendly fuel and the company is aiming to convert more in the future.

The train uses a blended fuel which is 20% biodiesel - to reduce CO2 emissions without harming the engine.

The London Euston to Llandudno passenger train leaves at 1127 BST (07/06/2007.)

The journey will be launched by prime minister-in-waiting Gordon Brown.

During the six-month trial , the train will run from Birmingham to Scotland , across South Wales , North East England , the North West , the West Country , the South West and the South coast.

If successful , Virgin hopes to convert its entire Voyager fleet to biodiesel fuel , which could cut emissions by 14%.