It's considered a renewable source of energy too, which means that the energy source (the sun) won't run out of power (at least not for billions of years).
Intaas waxaa sii dheer, waxay leedahay faa iidada weyn ee dib loo cusbooneysiin karo, taasi waa, qorraxdu ma daali doonto (ama ugu yaraan dhowr bilyan oo sano).