Atomic or molecular hydrogen and oxygen aren't readily available so water is a necessity that is hard to produce on the moon. Every necessary resource that can

Atomic or molecular hydrogen and oxygen aren't readily available so water is a necessity that is hard to produce on the moon. Every necessary resource that can be locally sourced decreases how hard it is to start a permanent base drastically. For instance, if theres water we can more easily grow plants which will both cycle air with us humans _and_ provide carbohydrates