This document discusses hybrid vehicles, including their history, functioning, the Toyota Prius model, and the need for hybrids in India. It provides details on Ferdinand Porsche developing the first gasoline-electric hybrid in 1901. The Toyota Prius became the first mass-produced hybrid in 1997. Hybrid vehicles have two power sources - an electric motor and a gasoline or diesel motor. The document performs a SWOT analysis of hybrid vehicles and reasons the Prius was not initially successful in India, such as high price and limited marketing. Upcoming hybrid models for India are also listed.