The problem to solve: By 2030, it is estimated that adequate housing will be required for 4B+ people living with yearly income below $3k. The United Nations calculated that over the next 15 years there will be an average daily requirement of 100k new housing units to meet this demand.
The solution: WASP, an enterprised based in Ravenna, Italy, has constructed the largest 3D-printer In the world. "BigDelta" is a 40-foot-tall, 20-foot-wide machine capable of "printing" affordable and sustainable houses for poor communities around the world.
Why? The house depends upon oil--in the form of extrudable plastic--and, thus, is completely unacceptable. They'd rather the poor live in thatched huts.
Let the discussion begin...