That might only be an upper limit on the economic potential. After all, buyers need to be incentivized to switch suppliers, and the fuel needs to be transported

That might only be an upper limit on the economic potential. After all, buyers need to be incentivized to switch suppliers, and the fuel needs to be transported to where it is needed. I used Nevada as an example because it's a low population density, highly undeveloped, sunlight-rich state, which makes it ideal for solar production plants. I'm sure other production facilities will spring up in the California desert and similarly situated regions around the world. What excites me most about solar energy plants is that it's ideal for our empty desert regions - Lots of sunlight, lots of undeveloped land, low population. Edit: The $4 billion figure seems off. If global demand is 60 billion liters, that's $45.6 billion at $0.76/liter. Am I missing something?