Desert city Timbuktu, in Mali, is the destination for a waste chocolate fuelled expedition raising awareness about how biofuels can help cut carbon emissions. Driving a salvaged truck called the Biotruck, Andy Pag and John Grimshaw will start the 4568 miles journey from the UK on November 26 using biodeisel made from waste chocolate. The fuel has been developed by biodiesel producers Ecotec, which was approached by Pag to sponsor the journey. After the three week expedition, the journeys carbon footprint will be independently assessed by green energy developer CarbonAided. The team will also be taking a small biodiesel production unit to a local charity in Mali, MFC, who will use it to produce fuel locally from sustainable sources. As well as the Biotruck, all the expedition equipment used has been salvaged from scrap and will remain in Mali where it will continue to be used. Explaining his inspiration for the trip Pag said: I was concerned about negative public reaction to biofuel and wanted to raise awareness that not all biofuels are bad. This fuel is carbon negative. Using waste sources means its not impacting on food sources. A lot of people don't realise that when biodiesel is made correctly, any unmodified diesel engine will run on it, and with the network of producers around the UK growing, it's getting easier for motorists to buy it. Timbuktu is a city that has suffered from the effect of climate change and highlights the urgency to act on climate change now.