all i can tell you is he's interviewed experts with deep extensive knowledge of how oil is used. there's one interview with a guy where the guy explains in details how all the parts of oil are used for over 45 min! most of it was over my head. some of his videos do go into great detail about how reknewables can't take the place fully. I think part of it is that wind and solar are too intermitent and that, that greatly limits their applicability.