Who knows what could be hiding in there! Or there! Or--*grak* bleedbleedbleed
The Green Belt is a uninterrupted path of land that composes a solid circle tectonic around the Ava.
Some areas are wide enough for cities to rest on them while others are painstaking to cross, being only a few steps across. The Green Belt reaches many of the main tectonics, meaning a lot of movement occurs on its surface, making it a dangerous place, but an absolute necessity for some to cross.
The Green Belt also has a wider variety of flora and fauna from around the sphere than anywhere else.
Certainly not the magenta belt!