The local news visits the largest glass recycling facility in Europe, in Dormagen. The report clears up a few mysteries about the ubiquitous glass-recycling boxes you see in Germany.
First of all, separating glass by colors actually does matter. You typically hear Germans saying it doesn't, because the trucks which clear the containers seem to dump everything haphazardly into the trailer compartment. Wrong! What bystanders can't see is that the trucks have separate compartments for each color of glass.
Glass of the wrong color, as well as non-glass items such as ceramics or even gun parts (according to the plant manager) are removed from the stream by hand. The rest is automated.
Oh, and although every box has a warning sign tells you to remove the lid before you recycle the bottle, this turns out to be wrong. The machines can easily remove lids, which are recyclable themselves, and intact bottles with lids are "more hygienic" for the human sorters to handle.
This has been your public-service post for the month of October.