Metrik: USA, Burma und Liberien

Was haben die USA, Burma und Liberien gemeinsam? Sie sind die einzigen drei Staaten der Welt, die nicht nach dem metrischen System rechnen. Krass formuliert bedeutet das:

What does this mean for you as an American? It means that when you travel you look like an idiot. When someone asks you for directions, you are suddenly at a loss, unable to estimate distance in kilometers. If one of your South American friends asks you how cold it is, you have no idea what to say. Is 30 degrees hot? Is it cold?