| Abbreviation | Definition |
|---|---|
| MSEA | Ministry of State for Environmental Affairs |
| MSEH | Master of Science in Environmental Health |
| MSEH | Masters of Science in Environmental Health |
| MSEL | Marin School of Environmental Leadership |
| MSEM | M S in Environmental Management |
| MSEM | Master of Science in Environmental Management |
| MSEP | Marine Safety and Environmental Protection |
| MSERM | Master of Science in Environmental and Resource Management |
| MSERM | Master of Science in Environmental Resource Management |
| MSES | Master of Science in Environmental Sciences |
| MSES | Matters of state environmental significance |
| MSES | Mountain States Environmental Services |
| MSR | Marine Scientific Research |
| MSS | Municipal Sewage Sludge |
| MSSRF | M S Swaminathan Research Foundation |
| MSSW | Management and Storage of Surface Waters |
| MSW | Municipal Solid Waste |
| MSWL | Municipal Solid Waste Landfill |
| MSWR | Mid Sussex Wood Recycling |
| MtCO2e | Million tonnes of carbon dioxide equivalents |