Not every recyclable material can be recycled efficiently. VWhich one below may not be one of the reasons for this? * In the case of widely distributed scrap, material contained in discarded products...

Extracted text: Not every recyclable material can be recycled efficiently. VWhich one below may not be one of the reasons for this? * In the case of widely distributed scrap, material contained in discarded products has to be collected, separated, and cleaned so that the economics is in the play. Some materials consist of large amount of impurities that the recycled materials cannot be used in place of a virgin material because of deterioration in material properties. Some materials cannot be separated from each other easily, i.e., fiber composites. The energy and emissions are higher for recycling processes of some materials than that of initial processes, and therefore, recycling may not be preferred depending on the material type.