Costume jewelry is considered a discrete category of fashion accessory, and displays many characteristics of a self-contained industry. Costume jewelry manufacturers are located throughout the world, with a particular concentration in parts of China and India, where entire citywide and region-wide economies are dominated by the trade of these goods. There has been considerable controversy in the United States and elsewhere about the lack of regulations in the manufacture of such jewelry—these range from human rights issues surrounding the treatment of labor, to the use of manufacturing processes in which small, but potentially harmful, amounts of toxic metals are added during production. In 2010, the Associated Press released the story that toxic levels of the metal cadmium. were found in children's jewelry. An AP investigation found some pieces contained more than 80 percent of cadmium.. The wider issues surrounding imports, exports, trade laws, and globalization also apply to the costume jewelry trade.