| Answer | Crossword Clue |
|---|---|
| AIRSPACE | Region that may be restricted |
| AREA | It may be restricted |
| AREA | One may be restricted |
| AREAS | They may be gray or restricted |
| AREA | It may be "restricted" on a military base |
| bioregionalism | Advocacy of the belief that human activity should be largely restricted to distinct ecological and geographical regions |
