My new Malian sister gave me some beaded bracelets as a going away gift. They were tied together with a little scrap of plastic bag.
Each morning, when our housekeeper started a charcoal fire for the tea, she used a bit of black plastic grocery bag as a firestarter. It worked like a charm.
Nothing is wasted in Mali. Not the bags, not the food, scraps of metal or bits of this or that. Everything, it seems, is put to good use.