Duration: 03:59 | Historically, most cars have run on gasoline, but that doesn't have to be the case in the future: other liquid fuels and electricity can also power cars. So what are the differences between these options? And which one's best? Dig into which fuel— gasoline, electric, biofuels, or electrofuels— is both affordable for consumers and sustainable for the planet. [Written by Elizabeth Cox and George Zaidan, directed by Lisa LaBracio, narrated by Jack Cutmore-Scott, music by André Aires].