Cars that guzzle grass

Hydrogen-based fuel cells not only offer the prospect of reducing the petroleum dependency, but they also promise to reduce the environmental impact of cars, because heat and water are the only "waste" hydrogen fuel cells produce directly. Such hydrogen energy is not abundantly available for use in its pure form. The development of biofuels particularly hybrid grasses highlight one of the biggest changes under way in energy production. The production cost of these grasses would be competitive with coal, but it comes with several advantages. The vision of a car as a lightweight consumer-electronics device may provide some hope to those who would otherwise believe the challenges in developing a mass-market hydrogen-fuel-cell car will keep the world waiting for generations