nearly all energy comes from the sun, either in a roundabout① way or straight from it, in the form of heat rays and light rays. the light from the moon, too, comes from the sun. the moon can be said to be like a large mirror which throws back the sun's light to the earth.
electrical energy comes from the sun in a roundabout way, e.g.②, it can come from the power of water falling down a mountainside③. the water fell there a
