Earth is the home of Humanity, located in the Solar system on the Orion-Cygnus arm of the galaxy. It is a verdant world which supports millions of native species. Vast smart cities rise high in the air, ensuring that their immense populations produce only a small physical footprint. They are surrounded on all sides by the lush preserves which now cover most of the planet.
While the lands and oceans have largely been healed by the extensive and costly Restoration Project, which aimed to reverse ecological damage of ages past, some areas remain barren. The North American badlands are a prime example, and very little has been able to grow there since the bombardment which occurred near the end of the Asia-Pacific war.
Aside from Damastion, Earth is the only class zero planet in the Imperial Combine. Seen from space it is a mainly blue ball wreathed in white cloud, with visible continents coloured green, brown and grey. The polar ice caps are white. Amongst the rocky planets orbiting its star, Sol, it has relatively high density and surface gravity. The rocky surface of the planet is a thin crust with relatively low density, essentially floating on a denser semi-liquid mantle.
A strong magnetic field deflects a significant amount of harmful stellar radiation. Also, around 71% of the surface of the planet is covered by water, an organic solvent. Both of these attributes contributed significantly to the emergence of life on the planet.