"No matter what fuel we use to power our power plant we will eventually run low unless it's a renewable."
By renewable, I assume you are referring to either the sun's fusion source (solar, wind, tides, etc) or the Earth's fission source (geothermal). Funny that you should regard it as renewable to harvest from nature's reactors that wastefully spew 99.99999% of their energy into the blackness of space and finite if we build our own ones that don't.
Oh, and learn to count. For any reasonable definition of limitless, the universe has limitless supplies of hydrogen.