// todo need optimize like in event.jsp. Add indexing or not indexing this page. 1990s-Today (1 gen 1990 anni – 1 gen 2018 anni) (Il nastro del tempo)

1990s-Today (1 gen 1990 anni – 1 gen 2018 anni)

Descrizione:

Solar cells are used in railroad crossings, homes, telecommunication, cars, aircrafts and many more things! Solar power is now an industry. The costis now $0.50 per watt... the prices have dropped 10% every year since 1980.