Not to get too far off in the weeds here with Formula E, which does apply to this convo to a certain degree, but electric cars, in reality, aren't the answer to an alternate of fossil fuels unless charged from a renewable source. They somewhat mention it here,
http://www.fiaformulae.com/en/news/2...free-charging/
but shipping a mobile charging station half way around the world at the cost of how many liters/gallons of diesel? Then add in the batteries and how awful they are to produce. It's a good try...sort of not really.
When it gets down to it, electric is far too experimental for LMP1 to even begin to consider it. Not even close to a decade. Panoz have come up with something radical, but I don't see it as sustainable (for motor racing).
So electric cars are less bad, but they are the most advanced form of alternate transportation, ATM, and that's where manufacture's see the market going, as unfortunate as it is, so that's where they want to put in efforts.
Yes, I'm part enviro whacko, the son of a tree hugging lumberjack