 From the 20th century to the age of the Kar-Rah, the planet's landscape as changed in all of the following ways EXCEPT:
The ripples that had ruffled the surface waters in the Pit, quieted again to glassy smoothness. The icy breeze tore tiny puffs of dust from grotesque, angling drifts of soil, nearly waterless for eons. Glacial ages, war, decadence, disease, and a final scattering of those ultimate superhumans to newer worlds in other solar systems, had done that. Loy Chuk had flown his geological expedition out from the far lowlands to the east, out from the city of Kar-Rah. Not the star-conquering demi-gods, but the ancestral stock that had built the first machines on Earth, and in the early Twenty-first Century, the first interplanetary rockets. A strange accident, happening in a legendary antiquity, had aided them in their quest for knowledge.
 Vegetation can only be harvested inside glass domes
 Vegetation can only be harvested inside glass domes  North America is an expansive desert continent  Cities are gone and species have moved underground  The Atlantic Ocean has disappeared