Carbon credits correspond to one ton of CO2e that is avoided, reduced or removed by the respective climate project that you support. It is a way to quantify the impact of the respective climate project and to add a price tag to the specific activity. The different climate projects employ all kinds of activities to avoid, reduce or remove CO2e and to mitigate climate change. After a carbon credit has been issued it can be traded in the Voluntary Carbon Market (VCM) until an end-user retires the carbon credit permanently.