Battery technology will improve on a curve without much govt funding. Already some of the battery technology is growing. IMO it won't need much govt prodding. Let the private sector do it naturally fed.
Well France has the most advanced one yet being built. I think 2020 it comes online. It will be used to try and figure out how to make them work as a powerplant. I;d rather invest money over the next 50 yrs going for fusion, then wasting it like Obama does. You know spending money on things the private sector will do if they made sense economically. No private companies can work on fusion without govt help. Its way too big and scientifically challenging.
So we get some electric cars. Do you really think that is going to cool the earth? If it does then I was wrong but I think we could all drive them and co2 would still go up.