| ACEA | European Automobile Manufacturers Association |
| ALS | Area Licensing Scheme |
| B2B | Business-to-business |
| BECCS | Bioenergy use combined with carbon capture and storage |
| BEVs | Battery electric vehicles |
| BMDVBMUV | Federal Ministry of Digital Affairs and Transport Federal Ministry for the Environment, Nature Conservation, Nuclear Safety and Consumer Protection (Bundesministerium für Umwelt, Naturschutz, nukleare Sicherheit und Verbraucherschutz) |
| BMWK | Federal Ministry for Economic Affairs and Climate Action (Bundesministerium für Wirtschaft und Klimaschutz) |
| BNW | Association for Sustainable Economy |
| BOF | Basic oxygen furnace |
| BSW | Behörde für Stadtentwicklung und Wohnen |
| BUKEA | Ministry of Environment, Climate, Energy and Agriculture of the City of Hamburg |
| CAPEX | Capital expenditures |
| CCS | Carbon capture and storage |
| CCU | Carbon capture and use |
| CCUS | Carbon capture, use and storage |
| CDR | Carbon dioxide removal |
| CII | Carbon intensity indicator |
| CMF | Clean marine fuels |
| CO2 | Carbon dioxide |
| CSRD | Corporate Sustainability Reporting Directive |
| DAC | Direct air capture |
| DBU | German Federal Foundation for the Environment |
| DCCAE | Department of Communications, Climate Action and Environment of Ireland |
| DG-ECFIN | Directorate-General Economic and Financial Affairs of the European Commission |
| Difu | German Institute of Urban Affairs (Deutsches Institut für Urbanistik) |
| EAA | European Aluminium Association |
| EC | European Commission |
| ECI | European Copper Institute |
| ECJRC | European Commission’s Joint Research Centre |
| EDGAR | Emissions Database for Global Atmospheric Research |
| EEDI | Energy Efficiency Design Index |
| EEXI | Energy Efficiency Existing Ship Index |
| EIT | European Institute of Innovation and Technology |
| EMC | Equitable Maritime Company |
| EPA | Irish Environmental Protection Agency |
| ESI | Environmental Ship Index |
| EU | European Union |
| EU CBAM | European Union Carbon Border Adjustment Mechanism |
| EU ETS | European Union Emissions Trading System |
| EUR | Euro |
| EV | Electric vehicle |
| EWKVerbotsV | Single-Use Plastics Labelling Ordinance (Einwegkunststoffverbotsverordnung) |
| FAO | Food and Agriculture Organization |
| FUA | Functional Urban Area |
| FCEVs | Hydrogen-powered fuel cell electric vehicles |
| GDP | Gross domestic product |
| GFS | Global Fuels Standards |
| GHG | Greenhouse gas |
| GLAD | Global LCA Data Access |
| GREET | Greenhouse gases, regulated emissions, and energy use in transportation |
| GT | Giga tons |
| GVC | Global value chain |
| GW | Gigawatt |
| H2 | Hydrogen |
| HCC | Hamburg Chamber of Commerce |
| HDE | German Retail Association (Kreislaufwirtschaftsgesetz) |
| HEI | High Education Institution |
| HiiCCE | Institute for Innovation, Climate Protection, and Circular Economy |
| HmbKliSchG | Hamburg Climate Protection Act |
| HYBRIT | Hydrogen Breakthrough Ironmaking Technology |
| ICAO | International Civil Aviation Organization |
| IEA | International Energy Agency |
| IFB Hamburg | Hamburg Investment and Development Bank (Hamburgische Investitions- und Förderbank) |
| IFM | International Freight Model |
| IISI | International Iron and Steel Institute |
| IMO | International Maritime Organisation |
| IMR | Irish Manufacturing Research |
| IPCC | Intergovernmental Panel on Climate Change |
| ISO | International Organisation for Standardisation |
| ISWG GHG | Intersessional Working Group on GHG Emissions |
| ITF | International Transport Forum |
| ITPCO | International Taskforce on Port Call Optimisation |
| IAPH | International Association of Ports and Harbours |
| ICT | Information and communications technology |
| IT | Information Technology |
| KIBS | Knowledge-intensive business services |
| KICKrWG | Knowledge and Innovation Community Closed Substance Cycle Management Act (Kreislaufwirtschaftsgesetz) |
| KSO | Climate Protection Initiative (Klimaschutzoffensive) |
| kWp | Kilowatt peak |
| LDCs | Least Developed Countries |
| LED | Light-emitting diode |
| LH2 | Liquified hydrogen |
| LIHH | Logistics Initiative Hamburg |
| LPG | Liquified petroleum gas |
| LRT | Light-rail transit |
| LULUCF | Land use, land-use change and forestry |
| MEPC | Marine Environmental Protection Committee |
| MWp | Megawatt peak |
| NEA | Nuclear Energy Agency |
| NEW 4.0 | North German Energy Transition initiative |
| NH3 | Ammonia |
| NOW | Nationale Online-Weiterbildungsplattform |
| NOx | Nitric oxide |
| NZT | Net-zero target |
| OPEX | Operational expenditures |
| OVAM | Flemish Public Waste Agency |
| P2P | Peer-to-peer |
| PAW | Natural Gas-Free Neighbourhood programme |
| PM | Particulate matter |
| PPP | Public-private partnership |
| PRI | Public Research Institutions |
| PV | Photovoltaic |
| R&D | Research and development |
| RCP | Representative Concentration Pathway |
| RECE-XG | Expert Group on a new generation of information for a resource-efficient and circular economy |
| RISN | Resource Innovation and Solutions Network |
| SAN | Styrene Acrylonitrile |
| SBTi | Science-Based Target initiative |
| SDG | Sustainable Development Goal |
| SEAI | Sustainable Energy Authority of Ireland |
| SEK | Swedish Krona |
| SME | Small and medium-sized enterprise |
| SPW | Walloon Public Service |
| SRH | Hamburg City Cleaning Service (Stadtreinigung Hamburg) |
| SSP | Shared Socio-Economic Pathway |
| TCFD | Task Force on Climate-Related Financial Disclosures |
| TUHH | Hamburg University of Technology (Technische Universität Hamburg) |
| TWh | Terawatt-hour |
| UAE | United Arab Emirates |
| UaW | United Against Waste Association |
| UfR | Companies for resource conservation (Unternehmen für Ressourcenschutz) |
| UK | United Kingdom |
| UN | United Nations |
| UNECE | United Nations Economic Commission for Europe |
| USA | United States of America |
| USD | United States Dollar |
| VC | Venture capitalist |
| VerpackG | Packaging Act (Verpackungsgesetz) |
| VRE | Variable energy use |
| WHO | World Health Organization |
| WTW | Well-to-wake |