These glass, tubular houses are an interesting concept, although not exceedingly practical.

They do, however, raise the interesting topic of building materials that can be used to build a more sustainable lifestyle, whether you are concerned about a survival situation or just want that type of lifestyle.

There are many questions that surround the concept of a glass, tubular house.

For instance, if built by design with a tree in the middle, how does one keep out insects and natural shedding of leaves during the turning of the seasons? How much energy would it take to cool the house in the summer?

But on a larger plane, if you are survival minded, you need to be thinking about using building materials that serve dual purposes and can be both sustainable and dependable. What do you think? Tell us below.