| Abbreviation | Definition |
|---|---|
| MACP | Mountain Areas Conservancy Project |
| MAEH | Malaysian Association Of Environmental Health |
| MAEH | Modern Asia Environmental Holdings |
| MAEP | Master of Arts in Environmental Policy |
| MAG | Modeled Available Groundwater |
| MAML | Mobile Air Quality Monitoring Laboratory |
| MAPP | Mountain And Plains Partnership |
| MARSH | Matching Aid to Restore State Habitat |
| MAXIMIZINGVALUEFROMMALAGASCRAPINSIGHTSINTORECYCLIN | Malaga, a bustling hub in the heart of the industrial and commercial sectors, has seen a significant |
| MB | Migratory Bird |
| MB | Missing Bin |
| MBES | Marine Biomedicine and Environmental Sciences |
| MCEA | Minnesota Center for Environmental Advocacy |
| MCET | Maryland Center for Environmental Training |
| MCF | Thousand Cubic Feet |
| MCL | Maximum Contaminant Level |
| MCPFE | Ministerial Conference on the Protection of Forests in Europe |
| MCSE | Minimum Critical Size of Ecosystems Project |
| MCSF | Montgomery County Sand Filter |
| MCWC | Middle Chattahoochee Water Coalition |