english: Now, whether we're talking about fuels or energy carriers, or perhaps novel materials for batteries or fuel cells, nature hasn't ever built those perfect materials yet because nature didn't need to.
non_english: Bez obzira da li pričamo o gorivu ili prenosnicima energije ili novim materijalima za baterije ili ćelijama goriva, priroda još uvek nije napravila te savršene materijale jer joj nije potrebno.