When you mix Styrofoam (extruded polystyrene) with gasoline, the Styrofoam breaks down. All the air inside escapes, and it becomes a wet, gooey mess. If left out to dry, it gets hard again, but not like before, without the air - it resembels plastic. I have a few questions about this. Are there any "harmful" gasses released by this process (other than the obvious gasoline vapors). Why does it happen? (keeping in mind that I know little-to-nothing about chemistry) What other chemical, if any, can be added in place of the gasoline to have the same effect? Thanks.