The article talks about how the world is changing the way we use energy, moving towards cleaner sources like wind and solar power instead of relying only on fossil fuels. The authors look at how this shift will affect the markets for oil, natural gas, and coal in the long term. They find that natural gas might do better because it's cleaner and can work well with renewable energy. However, oil will face challenges from new rules and more competition from other energy sources. As for coal, it's likely to be used less as time goes on, even though new tech can help reduce its impact on the environment.