Simple Math

Now this is getting silly. They've built a boat that will run on fuel produced from liposuction:

Demonstrating further commitment to the cause, Bethune underwent liposuction and donated enough to produce 100ml of biofuel, while two other, larger volunteers also had the procedure, making a total of 10 litres of human fat.

This in turn produced seven litres of biofuel, which could help the boat travel about 15km.

Earthrace is fuelled on 100 per cent biodiesel and has a net zero carbon footprint.

Seven liters of fuel takes them 15 km.? Then they only need 18,720 more liters to go around the world. And here's where the math comes in.

The amount of fuel needed to achieve a net zero carbon footprint is.... zero. Now unless my math fails me, this adventure will be using about 19,000 liters more than that.

Regardless, who wants to run a boat on liposuction fat anyway? In thermodynamics there's a term for it: yucky. And besides that, the boat would be entirely impractical for anyone, with the possible exception of Rosie O'Donnell.