Stockholm Environment Institute
| bridging science, policy and practice | |
| Abbreviation | SEI | 
|---|---|
| Formation | 1 January 1989 | 
| Type | Foundation | 
| Purpose | International research and policy | 
| Headquarters | Stockholm, Sweden | 
| Location | |
| Region served  | International | 
| Official language  | English | 
| Executive Director | Måns Nilsson | 
| Budget | 379 500 000 SEK (Global: 2022) | 
| Staff | 322 (2022) | 
| Website | https://www.sei.org/ | 
Stockholm Environment Institute, or SEI, is a non-profit, independent research and policy institute specialising in sustainable development and environmental issues, with seven affiliate offices around the world. SEI works on climate change, energy systems, water resources, air quality, land-use, sanitation, food security, and trade issues with the aim to shift policy and practice towards sustainability.
SEI wants to support decision-making and induce change towards sustainable development around the world by providing knowledge that bridges science and policy in the field of environment and development.