How do we know these exist of we don't know how to access our use them? Without access we can only estimate the reserves, and without a way to use it we can't c

How do we know these exist of we don't know how to access our use them? Without access we can only estimate the reserves, and without a way to use it we can't calculate the potential energy creation or storage. We really are screwed off our only hope is blind faith that tech can save us. Technology can help, but we can't abandon the option of decisions that can already be made today.