It's cheap, it's lightweight, and it runs on renewable energy. Best of all, it actually exists.
Izhar Gafni has worked in a number of fields, but until recently, cardboard bike design wasn't one of them. Inspired by the cardboard canoe and inexpensive computer tech (like the Raspberry) that have made these items affordable for consumers all around the world and easy to manufacture, Gafni realized a bicycle that was easy to build, sturdy, and most importantly, made of renewable resources, was probably something the world needed. But it wasn't easy, as he attests. This short film documents the design's concept and early models through to final design, shown above.