I think there is only limited correlation between physical energy and money. Money is directly tied with human work: wages for time and effort. Physical energ

I think there is only limited correlation between physical energy and money. Money is directly tied with human work: wages for time and effort. Physical energy can vary widely depending on the specific work, even when the price is the same. The cost of fossil fuel is low because the human work necessary to extract it is very low- it's a problem for the ecology due to no (immediate) human work cost for the Co2 damage. The cost of solar is even lower (which is why it's disruptive)- once you have the solar panel, you don't need any human work.