Need a Building? Just Add Water

In a world with millions of refugees, numerous war zones and huge areas devastated by natural disaster, aid agencies and militaries have long needed a way to quickly erect shelters on demand.
Soon, there will be such a method. A pair of engineers in London have come up with a "building in a bag" -- a sack of cement-impregnated fabric. To erect the structure, all you have to do is add water to the bag and inflate it with air. Twelve hours later the Nissen-shaped shelter is dried out and ready for use. ...more ...info