But if you wanted to know what the perfect energy source is, the perfect energy source is one that doesn't take up much space, has a virtually inexhaustible supply, is safe, doesn't put any carbon into the atmosphere, doesn't leave any long-lived radioactive waste: it's fusion.
Però si voleu saber quina és la font d'energia perfecta, la font d'energia perfecta és aquella que no ocupa gaire espai, té un subministrament virtualment inesgotable, és segura, no emet gens de carboni a l'atmosfera, no deixa residus radioactius de llarga durada, és la fusió.