Most unique feature of this car is the human physiology interface, (HPI), enabling the driver's physiology to behave as if the driver was walking instead of sitting behind the wheel. This feature makes the driving experience safe, fun and invigorating. All body panels of LEAF are made from laminated bamboo which is stronger than metal, lighter than metal and renewable. Propulsion is all electric with lithium batteries augmented by regenerative braking and solar panel, plus plug-in.