Downvoted? But I'm not being sarcastic, really! Let's say hypothetically, for whatever reason, all of the metal in a society could no longer be used (hyperinf

Downvoted? But I'm not being sarcastic, really! Let's say hypothetically, for whatever reason, all of the metal in a society could no longer be used (hyperinflation, scarcity, factories are shut down, Act of God, Zombie Apocalypse, you're trapped on a desert island, ?) -- OK, so then, the next question then is What can you make simple forms of transportation out of? Well, you'd never think that bamboo could be used to create bicycles -- until you saw this article! So I reiterate, a brilliant idea!