Unusable freezers belong to the category “Large electrical equipment”, which should be delivered to recycling centers. Usable ones can also be given to friends or advertised for free or for sale. Old refrigerating appliances contain the cooling agent freon, which is an ozone depleting substance. Additionally, refrigerating appliances contain oil which is categorized as hazardous waste. Freon and oil are emptied from the freezers and processed appropriately. The freezers are dismantled and their components sorted for recycling. The major recycling categories are iron, aluminium, copper and plastics.