>>513470481
>there's nothing else on the moon, just rocks and sand
Several options exist for using lunar resources to create rocket fuel, including liquid oxygen (LOX) and liquid hydrogen (LH2), as well as aluminum and liquid oxygen.
Producing fuel on the Moon could significantly reduce the cost of space missions, especially for those traveling beyond Earth orbit. It would reduce the amount of fuel that needs to be launched from Earth, which is a major expense.