Hydrogen storage and, consequently, driving range are major challenges in the development of fuel-cell vehicles.

Think Technologies is moving ahead with development of a fuel-cell vehicle for 2004.

We could transition to using electric or fuel-cell vehicles.

Right now, electric and fuel-cell vehicles are relatively expensive and impractical.

Of course, numerous technical obstacles must be overcome before fuel-cell vehicles become practical.

In the next section, we'll see how efficient fuel-cell vehicles can be.

The Government wants to demonstrate the feasibility of fuel-cell vehicles.

Virtually every major manufacturer has a fuel-cell vehicle in the works, but none are likely to reach the market before 2004.

For example, China has already built its own fuel-cell vehicle.

G.M. has said that its fuel-cell vehicle will be ready later this decade.