Some times a lot of people throw their furniture when those were bad or old, usually this ocurrer when people changhes their fueniture and have been, get an amazing emotions, and they usually only wants to discard the old stuff.
When this happens, poeple do not wants to work any more, they do not pay attention about the garbage or the pieces of you have been discard.
One examples are the screw, a lot of this could finish in the garbage and if you are care about this you can get some things for other building.
Please be recycling, we can changes our world, it needs ours.