| Term | Definition |
|---|
| AAU | Assigned Amount Unit |
| CCS | Carbon Capture and Storage |
| CER | Certified Emission Reduction |
| CO2 | Carbon Dioxide |
| CO2-e | CO2 equivalent |
| CP1 | First Kyoto Commitment Period |
| DNA | Designated National Authority |
| ERPA | Emissions Reduction Purchase Agreement |
| ERU | Emission Reduction Unit |
| ETS | Emissions Trading Scheme |
| EU ETS | European Union Emission Trading Scheme |
| GHG | Greenhouse Gas |
| GIS | Green Investment Scheme |
| Gold Standard | VER standard offered by the Gold Standard Foundation |
| lCER | Long-term Certified Emission Reduction |
| JI | Joint Implementation |
| NAP | National Allocation Plan |
| NZU | New Zealand Unit |
| REDD | Reducing Emissions from Deforestation and Degradation |
| RMU | Removal Unit |
| tCER | Temporary Certified Emission Reduction |
| UNFCCC | United Nations Framework Convention on Climate Change |
| VER | Voluntary Emission Reduction |
| VER+ | VER standard offered by TÜV SÜD |
| VCS | Voluntary Carbon Standard |