Daimler, owners of Mercedes-Benz and Toyota have both been working separately on numerous future-fuel technologies with hydrogen fuel-cell vehicles seen as the pinnacle in green-motoring. Hydrogen cars emit only water vapours but are currently expensive to produce given the high amounts of pricey metals required for the fuel-cells that power them.
Hydrogen vehicles will also be capable of travelling longer distances on a single "tank" than current electric vehicles.
So far Mercedes-Benz, General Motors, Hyundai, Honda, Nissan, Ford and Toyota have all agreed to work together on fuel-cell technologies when possible. The first generation of mass-produced hydrogen powered vehicles is expected by around 2015.
Hydrogen cars are not a new idea, Daimler has already spent an estimated U.S. $1.23 billion ($1.5 billion) on hydrogen related projects since 1994 whilst Toyota has been on the case since 1992.
It seems that every day now we are covering a development which involves either electric, hybrid, or hydrogen powered vehicles. The future of motoring is sure to change in the not so distant future.