Economic product created by solar energy. It could be as simple as the money saved on someone's fuel bill, or as complex as hydrogen, which functionally replaces fossil fuels with none of the pollution and further is convertible to human consumable food, functionally replacing at least some of this also relieving some of our load on the traditionally natural food chain, allowing the latter to recover (See "Solein"), the journeys made and all the work done sourced from solar is economic product. Notice solar is the source of all energy on Earth, there is no other.