The challenge is to find a method which people can use to build living spaces or survival huts from things that are available in urban areas. How can we build shelters when everything else is destroyed? Many people live on the streets with very little - but everywhere there are resources. Let's think of them and find a way to build with cardboard and junk. The answer to this challenge can be either a method of making shelter which anyone can accomplish, or a style of cheap shelter made of disposable or recyclable pieces. Build with trash and change the world.