greenbelt

/G R IY1 N B EH0 L T/
noun
  1. 1

    An area of agricultural land around an urban area that is protected from large-scale housing

  2. 2

    An intermediate rank;

  3. 3

    Someone who has earned the rank of green belt.

Source: https://en.wiktionary.org/wiki/green%20belt, https://en.wiktionary.org/wiki/greenbelt