Cars are slowly taking over the world. Ever since we ditched the horse as our means of transportation, the motor vehicle has become our primary source of getting from point A to point B.

The future is green, renewable, not dependant on oil. The best bet is fuel cell. Though this technology is over a century old, the price was too high to use this practically. But recent commitment from various governments, universities and various car companies since 1990 has increased the level of technology and reduced the price drastically. Now hydrogen fuel cells are coming within the decade.

Hydrogen fuel cells use hydrogen to power their engines. Although directly using hydrogen is polluting, technology is being developed to use hydrogen to create electricity to power the vehicles. This type of engine is still far from being practical but several companies have released prototypes.

• BMW - The BMW Hydrogen 7 is powered by a dual-fuel internal combustion engine and with an auxiliary power based on UTC (United Technologies Corporation) Power fuel cell technology. Both models use Liquid Hydrogen as fuel. 
• Daimler Chrysler - F-Cell, a hydrogen fuel cell vehicle based on the Mercedes-Benz A-Class.
• Ford Motor - Focus FCV (fuel cell vehicle), a hydrogen fuel cell modification of the Ford Focus, and E-350 buses, which began being leased in late 2006.
• General Motors - multiple models of fuel cell vehicles including the Hy-wire and the HydroGen3.
• Honda - currently experimenting with a variety of alternative fuels and fuel cells with experimental vehicles based on the Honda EV (electric vehicle) Plus, most notable the Honda FCX, powered by a front-mounted 80 kW AC electric motor, with 20 kW pancake motors providing supplemental power to the rear wheels. Electrical energy is provided by a 100 kW hydrogen fuel cell, with regenerative braking energy stored in ultra capacitors. Production versions of the FCX are expected to arrive in 2009.
• Hyundai - Tucson FCEV (fuel cell electric vehicle), based on UTC Power fuel cell technology.
• Mazda - RX-8, with a dual-fuel (hydrogen or gasoline) rotary-engine.
• Nissan - X-TRAIL FCV (Fuel cell vehicle), based on UTC (United technologies Corporation) Power fuel cell technology.
• Morgan Motor Company - LIFEcar, a performance-oriented hydrogen fuel cell vehicle with the aid of several other British companies.
• Toyota - The Toyota Highlander FCHV (fuel cell electric hybrid vehicle) and FCHV-BUS are currently under development and in active testing.
• Volkswagen - hydrogen fuel cell cars in development.
• REVA - cars made by the Maini Group also hope to convert their battery operated cars into fuel cell cars.