Fuel-efficient cars go "Zap"

The Xebra, from automotive pioneer Zap of Santa Rosa, Calif., is one of the world's only production all-electric cars. The four-passenger vehicle will sell for under $10,000.

Zap has also produced two prototype "trybrid" automobiles manufactured in a partnership with Brazilian automaker Obvio! Automotoveiculos S.P.E. Ltda., of Rio de Janeiro. The trybrids can run on gas, electricity, or alcohol and should be available by 2007.

Worldcar, a hydrogen-powered vehicle, uses a hydrogen-electric hybrid drive train.