It wasn't until the late 1960s that the interest in electric cars saw a revival due to environmental issues and adverse impacts of greenhouse gas emission associated with modern day's gas guzzlers. One of the major turnarounds for electric cars was the energy crises in the 1970s that continued for a decade due to political volatilities in Arab countries and the Iranian revolution. It was then that the most popular electric car model – CitiCar – was developed and marketed by Fla.-based Sebring-Vanguard, Inc. Other prototypes of electric cars – Electrovair and Electrovette – were being developed by General Motors Company (GM- Free Report) but failed to hit the road. Overall, these developments were short lived and failed to make an impression in the commercial space due to several associated drawbacks, the major being high expenses.