Evidence of the risks of POPs and particularly PCBs to health and the environment has existed since the 1930s. However, it is not until the adoption of the Stockholm Convention in 2002 and its subsequent entry into force in 2004 that a sustained process began to identify and quantify the stocks of PCBs worldwide and to comply with the overall goal of phasing out the use of contaminated equipment by 2025 and to achieve environmentally sound waste management by 2028.