It also feels like some of the transportation needs that were included in this video's lithium battery calculations could be handled with capacitors instead of batteries. I believe we should be targeting capacitors for all of our public transportation infrastructure that travels set routs and routinely stops for 10-30s. Busses, light rail, etc can have quick charging stations along the route and you can not only drastically reduce the electric storage (and therefore remove lithium entirely), you can reduce the weight of these vehicles.