Elon explained the future of energy abundance more than a decade ago Humanity already has the ultimate power source sitting above us every day: The Sun “The vast majority of Earth’s energy already comes from the Sun. Without it, Earth would be a frozen ice ball” And the scale is even difficult to comprehend A roughly 100 × 100 mile area covered in solar could generate enough electricity to power the entire United States That’s only a tiny patch of land compared with the size of the country The energy itself is already there in enormous abundance The real challenge is building enough solar, batteries and transmission infrastructure to capture it, store it and move it wherever it’s needed We basically have a gigantic fusion reactor in the sky sending us free energy every day We just need to get better at using it