The fuel-cell and Hydrogen-based propulsion
While electrical and hybrid cars are slowly replacing conventional models, the next generation of fuel-cell vehicles (FCV) are under development by leading car manufactures. These will be based on fuel-cell technology and hydrogen propulsion, and the result is cars emitting no CO2.
How it works
A fuel-cell is effectively a battery. The electrical energy is generated by a chemical process combining hydrogen (4H2) and oxygen (O2). The result is electricity and water. The technology produces no carbon dioxide, which contributes to global warming.
Click to enlarge
Source: EPA (USA)
Vehicle performance
An FCV will have no large engine to content with. This means a quiet drive, while perfect balancing and handling is achieved. In addition, improved fuel economy and drivability is expected. Fuel-cell efficiency (~60%) is expected to be more than double that of a conventional vehicle.
When can I have one?
All the leading car manufactures are working on prototype models. Mercedes is testing fuel-cell buses in China, while UPS is working with American partners to test a small delivery van.

It is expected that fuel-cell and hydrogen powered cars will hit the market in 5 - 10 years. This means that we realistic is looking at 2012 for the first commercial sales to start.
Any drawbacks or problems?
Yes, the technical components making up a hydrogen fuel-cell need to be reduced and improved further to ensure vehicles can store enough hydrogen for a 300 miles journey.

In addition, not may petrol stations sell Hydrogen. Honda is testing a hydrogen refuelling station, which generated hydrogen from sunshine and water. But do not expect to see one near you in the short term.
1) Degradable Plastic
2) Carbon Capture
3) Domestic Fuel Cell
4) Ethanol
Low Carbon Technologies
6) Fuel-cell Vehicle
5) All-weather Solar Energy Power
7) Carbon Trading
8) Fusion Technology
9) Autoclaving
10) Geo-engineering