共同実施
Like the Kyoto trading scheme, EU ETS allows a regulated operator to use carbon credits in the form of Emission Reduction Units (ERU) to comply with its obligations. A Kyoto Certified Emission Reduction unit (CER), produced by a carbon project that has been certified by the UNFCCC's Clean Development Mechanism Executive Board, or Emission Reduction Unit (ERU) certified by the Joint Implementation project's host country or by the Joint Implementation Supervisory Committee, are accepted by the EU as equivalent.