3D printing is a strand of technological advancement that rarely hits mainstream information channels - perhaps there are more important things to consider.
If you have any interest in the future and sciense you should see this. See how a man make glass bovl and other stuff with only the sun and the sand in the desert as resourses. It's amazing. Its the idea that is the point here, not the glass bovl - but the idea off making things only with the resourses like sun and sand. :-) @safegaard