Washington, Jan 9 (ANI): Two eco-minded British adventurers have completed their expedition to Timbuktu in a truck fuelled by chocolate.

Andy Pag, 34, and John Grimshaw, 39, attempted the first ever carbon-negative driving expedition across the Sahara Desert.

The pair drove 7,250km (4,500 miles) in a month, overcoming sandstorms, corrupt bureaucracy and a rapidly crumbling truck - to deliver a biodiesel processing unit and the vans to a charity.

Pag and Grimshaw, from Poole, Dorset, left the UK on Nov 26, 2007, and arrived in Mali, West Africa on Boxing Day.

They took 2,000 litres of bio-diesel made from 4,000 kilograms of chocolate misshapes, the equivalent of 80,000 chocolate bars, to fuel their adventure.

The trip was made possible by biodiesel producer Ecotec, which turns waste chocolate into fuel by heating it and mixing it with a number of chemicals, including a secret ingredient.

MFC, a Malian charity, plans to use the processor to make biodiesel from desert weeds.

“We wanted to do a trip that wouldn’t have a detrimental effect on the environment,” The Sun quoted Pag, as saying.

Pag and Grimshaw said that they now want to travel to China on a rubbish-powered aircraft. (ANI)