The task.- The growth in numbers of cars.- The number of broken-down cars.- Broken-down cars and volumes of scrap.- The problem of domestic appliances.- The developments in steelmaking processes and their effect on the demand for scrap.- Requirements deriving from the scrap market.- Requirements of the steel industry concerning scrap qualities.- The effects of scrap properties on the steel quality.- The collection of broken-down cars and appliances.- Scrap preparation techniques.- Shredding.- Costs inherent in the shredding process.- The role of transport costs.- The cold shredder; a special method.- Old tyres and their disposal.- Legal questions in the marginal field of economy and ecology.