The term 'Environmentally Friendly Auto' can be summarized as an Ecocar, which is a six-letter word. An Ecocar is a type of vehicle that has been designed to reduce its environmental impact and conserve natural resources. It typically uses alternative fuels such as electricity or biofuels, and has improved fuel efficiency and lower emissions than traditional cars. Ecocars are becoming increasingly popular as people become more aware of the need to reduce their carbon footprint and protect the environment.