Zoom on Energy - Which fuel for tomorrow's car?

98% of the world's transport sector depends on oil products.

With their range (over 600 km) resulting from their energy density, and drawing on mature, inexpensive refining techniques, fossil fuels still have considerable advantages.

However, their pre-eminence is constantly threatened by two major weaknesses. The thermal engine delivers only moderate efficiency: 36% for the petrol engine, and 42% for the diesel engine.