I was hoping that now that we have water that oil and lava can be added. I am picturing having to drill underground to collect oil. As we grow more advanced then we can craft batteries and solar panels and live without the need for peteoleum. There are enough caves and the earth is deep enough that oil reserves should not be a problem.
As I brought up the idea of lava tubes in another post, I was thinking that when lava produces heat that we can get into geothermal energy. Hydro too now that we have water but that may require springs and dynamic water.