At the cutting edge of automotive design and technology, the 2009 Toyota Prius is propelled by a hybrid powerplant consisting of a battery-powered electric motor teamed to a gasoline engine. The two units can work in tandem or individually, allowing the Prius to earn uncommonly good fuel economy figures while producing extremely low (and, under certain conditions, zero of currently regulated) emissions. Offering as much head and legroom as a mid-sized Camry sedan, the Prius can comfortably accommodate four adults, has a surprisingly smooth ride and can be loaded with such high-tech features as a rearview monitor and DVD navigation. For environmentally savvy families seeking to conserve both fuel and the great outdoors, the Prius is second to none.