There are two fundamental phenomena that have enabled life to emerge and thrive on planet Earth. One is the continual flow of solar energy from the sun, and the other is the cycling of a finite amount of material on earth.
The book page reproduced below is from my handmade book One Earth.
Sunlight is a perpetual energy source-- at least in time frames meaningful to humans. I am always amazed that today's environmentalists and energy experts persist in calling solar energy a "renewable" energy source. It is not renewable; it is inexhaustible. Maybe solar energy would gain more traction as our wisest choice if more people realized we will never run out of it.