Cement is good for hiding whatever lies underneath. Old mob movies bring to mind laughing goons pouring the wet grey slurry over an unlucky victim, while rotting garbage is buried underground and sometimes paved over. Cement is not seen in a positive light, especially not when it comes to the environment.
The innovative mind of John [...]

You look through it, drink out of it, watch television with its reflection-glass is everywhere. The uses are almost endless. Glass has existed since the beginning of time, where natural intense heat created by volcanic eruptions, meteors and lightning strikes transformed certain rock into this shiny smooth material. The earliest glass (non-translucent) dates back to [...]