Cool cars: 2010 Toyota Prius

The 2010 Toyota Prius, launched this spring, is available with a sliding glass moonroof with solar panels, located over the rear seating area, that power a new ventilation system. This solar-powered ventilation system uses an electrically powered air circulation fan that does not require engine assist, according to the manufacturer's press kit. The system prevents the interior air temperature from rising while the vehicle is parked, making the cool-down time shorter when the driver returns to the vehicle, thus reducing the use of air conditioning, the release states