I used to read PopMech in the bathroom, but years ago it fell far below even that modest standard. Today, I wouldn't wipe myself with it. "By using common mate

I used to read PopMech in the bathroom, but years ago it fell far below even that modest standard. Today, I wouldn't wipe myself with it. "By using common materials..." Which ones? In what arrangement? How would it scale to the level of atmospheric scrubbing? They mention copper and carbon later, but fail to mention if that carbon is in the form of nanotubes, or some more easily mass-manufactured form. If you read this article and come out of it with fewer questions than you did going in, you're doing it wrong.