Answer:

greenbelt

Answer	Crossword Clue
GREENBELT	Karate award
GREENBELT	Manmade desert border
GREENBELT	Eco-friendly border

GREENBELT	Urban sprawl checker
GREENBELT	Lush tract near a residential area
GREENBELT	Maryland home of the Goddard Space Flight Center
GREENBELT	Wooded area surrounding a community
GREENBELT	What may encircle a rising chopper?
GREENBELT	Intermediate level in karate