Biopetrol Industries AG - surely not the best choice of name for a biodiesel company - has just tripled fourth-quarter profit to more than 3 million euros as it finished building a new plant in Rostock, Germany.

The company now has a capacity of 350,000 tonnes of biodiesel production a year. Said Biopetrol Industries' Supervisory Board Chairman, Werner Klink;

"Biodiesel is now the leading sustainable alternative fuel. As long as the sun goes on shining, there will be plants. Biodiesel made from vegetable oil helps to protect the environment, safeguards jobs and opens up attractive long-term investment options."

And according to this great wiki, biodiesel can also point to a higher energy density of 42.2 MJ per kg compared to just 30 for ethanol. That means that for the same weight of fuel, biodiesel can take you much further.