Obviously, petroleum is finite and we can't use it forever. We are starting to feel the pinch, now. We are have nearly prospected ourselves out of petro sources. Good reading, here (they are honest about it): https://group.met.com/en/mind-the-fyouture/mindthefyouture/when-will-fossil-fuels-run-out But no one is pushing nuclear except India. They are the only ones strongly working on thorium reactors. https://www.world-nuclear-news.org/Articles/Indian-test-reactor-reaches-operation-landmark And we keep talking about fusion being the future. But not seeing much progress, there. However, we did hit another major milestone with fusion and sustained a mini-star for 5 seconds and extracted the energy: https://www.bbc.com/news/science-environment-60312633