Grunt Homeworld
From Halopedia, the Halo wiki
The colloquially-named Grunt Homeworld is the planet from which all of the Covenant Unggoy (Grunt) race originally originated.
Topology
The Grunt Homeworld is believed to mirror the Human homeworld Earth in that it appears it has two or more climatic zones - swampy and hyperborean. It is noted to have swamps interlaced with "naturally occuring pillars of fire", marshes, and ponds. However, it is also noticed to be of extreme low temperatures in other locations, probably like the poles.