Spain team at Shell eco marathon 2010
The Shell Eco-marathon challenges around high school and college student teams from around the world to design, build and test energy efficient vehicles.
With annual events in the Americas, Europe and Asia, the winners are the teams that go the farthest distance using the least amount of energy.
This year's competition in Europe is the 30th time the event is held. Over 200 teams and 3,000 students take part in the challenge.
Organization: Royal Dutch Shell