This interview is interesting in the sense Sankar gives a neverbefore heard beginnings to today summary of EFL's history. How Sankar was actually working for a solution to water pollution when the company was bought. His Non-Compete agreement forced him to find another area to focus on. Thus, air pollution and batteries.  

A number of folks have criticized/hammered EFL through the years for being unsuccessful with a number of their ventures e.g. Norway, the Maya etc. When in reality, EFL was actually one of the first/leading edge companies to suggest and create an electric vehicle, along with other ideas. As he tells it, these ideas were VERY EARLY and never had much chance to develop at the time. This helps us longterm investor/traders understand they were never really poised for primetime. They were a lot of R&D. At least until now.

He also discloses his involvement with some pretty significant people and groups around the world. EFL may not be big, but they do seem to have a lot of experience, knowledge and connections.