### Comment:
It's also the most dense, easily transportable source of energy in the world.  Maybe society needs to burn it for energy to sustain itself and it isn't for shits and giggles.  Gasoline is 10x the energy density of batteries.

### REPLY:
that's the rub. it is all about energy density. at least it is down here at the bottom of this gravity well. battery tech is definitely the knothole that renewables must pass through. do you happen to know the numbers for how quickly and how much batteries have improved in that respect over the last [x] time? this battery knothole [and tesla's domination of that production capacity] is what makes tesla a long term growth stock.

### END.