In 2021, the new trading period of the EU ETS will start. This phase will run from 2021 to 2030. In the transition to this phase, a number of issues must be kept in mind regarding the use of emission allowances (EUA and AEUA). The rules for the use of CERs and ERUs will also change in phase 4. On this page you can find further information about emission allowances in the new trading period.