One billion grain per second: Forced migration

Architecture student Magnus Larsson details his bold plan to transform the harsh Sahara desert.

"A vast 3D printer made of bacteria crawls undetectably through the deserts of the world, printing new landscapes into existence over the course of 10,000 years"

Magnus's TED Wish: "If I had something like a TED wish, it would be to actually get it built, to start building this habitable wall, this very, very long, but very narrow city in the desert, built into the dunescape itself."