“Renewable sources” are also notoriously unreliable, and because of their nature, must be located very far from the point of use, requiring a vast grid just to deliver the power. And transmission losses from sending electrical current over long distances demonstrates the reality of something called entropy, a concept in which all energy is converted to heat, which dissipates and provides no additional useful purpose.
The greenest technology now on the horizon in any reasonable time frame is Thorium-fueled Molten Salt nuclear reactors. No carbon, able to run baseline power flat-out full output for months or even years before servicing, and vastly safer than Uranium-fueled Light Water nuclear reactors, which can retain radioactive emissions for years, even centuries, afterward.
The theoretical work has all been done and practical operating plants have been demonstrated. It is a matter of working out a few remaining engineering details and getting this technology into mass production.
Nearly endless electrical power for the entire world.
But NOOOO. People would start getting too prosperous and having too much fun.
Giur thorium fueled reactor may run forever but yiu still have to do r&m on the moving parts, pumps, turbines, piping, instruments, the building, and people need to retire and new ones need to be trained. Its not prepetutal motion. Things break or wear out.