I think owning a BMW hybrid car is a good idea and I would like to own a hybrid because of the gas prices these days. Whenever brakes are applied energy is generated. This is stored in the batteries and used whenever required. No additional charge is required for the batteries of a hybrid car. It must be compressed or liquefied to use in an automobile. It is possible to have bi-fuel vehicles, which run on regular gasoline or natural gas. The hybrid technology used in cars today is very new and its development costs have not yet been recovered by manufacturers.