Approximately 12-15 million vehicles reach the end of their use each year in just the United States alone. These automobiles, although out of commission, can still have a purpose by giving back the metal and other recyclable materials that are contained in them. The vehicles are shredded and the metal content is recovered for recycling, while in many areas, the rest is further sorted by machine for recycling of additional materials such as glass and plastics. The remainder, known as automotive shredder residue, is put into a landfill. The shredder residue of the vehicles that is not recovered for metal contains many other recyclable materials including 30% of it as polymers, and 5-10% of it as residual metals. Modern vehicle recycling attempts to be as cost-effective as possible in recycling those residual materials.  Currently, 75% of the materials are able to be recycled. As the most recycled consumer product, end-of-life vehicles provide the steel industry with more than 14 million tons of steel.