Discusses how these machines work, the science behind the energy they make, and what the use of hybrid cars means for the planet. Features full-color photographs and illustrations.

Saving on gas, saving the air -- Gasoline cars -- Electric cars -- Inside a hybrid -- Hybrids on the road -- Hybrid history -- More and more hybrids -- Not just cars -- Saving the environment -- Saving fuel -- Some drawbacks of hybrids -- Plug-ins -- More options.