The problem is storing and moving the energy. We could theoretically capture lightning strikes (electrostatic discharge) and store those to power things. Ther

The problem is storing and moving the energy. We could theoretically capture lightning strikes (electrostatic discharge) and store those to power things. There's plenty of renewable energy out there, we just can't capture it efficiently, store it very efficiently, or move it around very efficiently. As such as rely on power sources that provide output rates were good at capturing energy from: fossil fuels stored as energy, nuclear fission, solar (fusion, sort of, we're not that efficient at it), hydroelectric (kinetic/gravity, solar/nuclear from the sun), and geothermal (which is just partly just fission again). A lot of stuff just dissipates into the environment and we only capture a small bit of it. With all that said I think humanity will always grow beyond its means in terms everyone having a desirable amount of energy and materials to meet a certain standard of living.