A buddy of mine just finished his MBA with a focus on "Sustainability", I get a kick out it because to me the term is just the current buzzword for good long-term business practices, same as they have always been. As a Tesla investor and general EV/solar/earth-loving sustainability fan I'm excited to finally see the growth of investment in the these areas, it feels good to hear of the idea of Gigafactories that will recycle their own batteries being built rather than coal plants or oil rigs. However, I wonder if Rockefeller building his empire 100+ years ago sounded a bit like Musk right now. So my question is are all these batteries and solar panels going to be truly "sustainable" or could they eventually start causing new environmental problems from some seemingly inconsequential by-product that is too inconvenient to recycle or mountains of obsolete solar panels piling up in fifty years? It would be cool if we could solve this problem created by past generations and make this leap in technology AND do it without creating new ones?