Hungry? Better turn on your linear induction motor and send a metal capsule through an underground polyethylene tube to retrieve some groceries.
That's the vision of Foodtubes, a UK program that seeks to reduce carbon emissions by building a pipeline-capsule system to deliver food and freight. A series of tubes could ferry 6-foot-long metal bins among neighborhoods, entire cities or even to different countries, moving goods at 60 mph using linear induction motors and intelligent routing software.
Forget about carrying cargo by truck, and instead imagine shuttling goods around inside a series of underground tubes. That's the hope of Henry Liu, a 73-year-old retired civil engineer and a past winner of PopSci's Inventions Awards for his environmentally safe green bricks.