Copper has been in use by civilization for over 10,000 years and has been recycled since early times. Because it does not degrade during recycling, copper in use today could have been first fabricated into objects thousands of years ago. Copper is highly prized by scrap metal collectors and scrap metal recycling businesses. The nonferrous metal is the best conductor of electricity except for silver. That electrical and thermal conductivity, along with properties of high ductility and malleability make it one of the most demanded metals by industry, eclipsed only by iron and aluminum.