Diesel engine ship

Diesel engine ship "Earth Race" left Barcelona port and try to break the record of the time takes to go arround the earth. Fuel of the ship is 100% diesel which is ecological. Captain of the ship want to prove diesel works as gasoline. It is good thing to use more ecological resources. I think this kinds of resources will become popular because of the lack of gasoline and other natural resources. I want to buy eco car when I get enough money to buy some day.