Without the sun, life as we know would not exist. The light and heat radiated by the sun sustain plant and animal life on earth, providing the fuel for all of the planet’s natural processes. Since humans walked on the earth, we’ve used the sun in countless ways.
Most of earth’s surface receives enough sunlight making it viable to use solar energy. In fact, each hour of sunlight that reaches the earth contains potential energy greater than the amount of electricity used annually by every person on the planet.