The EU's "double directives" for environmental protection require producers to recycle the WEEE directive of electronic waste and prohibit the use of 6 hazardous substances in products. After its entry into force, it affects the nerves of the global manufacturing industry. The effectiveness of ROHS throughout the 25 member countries of the European Union, and is likely to become the 1 global standard. Other countries have also formulated various versions of the "ROHS directive". For example, Japan has issued JISC0950 standards; although the United States has not promulgated global relevant laws and regulations, some states, such as California and New Jersey, have developed local regulations to restrict the use of lead and other harmful elements; on the other hand, the disposal of waste electronic products has made considerable progress, and foreign to the picture tube, compressor, epoxy printing. There are more advanced ways to deal with components such as circuit boards and batteries, which effectively solve the key technical problems of material separation.