by Green Plastics
Polystyrene. It’s those firm, oddly-shaped foam pieces that fit around the computer or television when you first take it out of the box. It can be used to make plates and cups. (You can find a fun introduction to the material here.)
In one of its forms, it looks like tiny puffy white beads pressed together into a solid, hard shape. And normally, those tiny puffy white balls are made from petroleum.
But what if they weren’t?
Gregory Glenn and Simon Hodson have developed a new technique for processing starch plastic that yields an end result much like polystyrene foam.
According to the article, the process works generally like this: