One startling difference between the planets Earth and Zerozone is that on Zerozone there is sea where Earth has land.
The peoples of Zerozone cling to the narrow bands of green that surround the blue waters of their desert world.
Their lakes and seas have a similar shape to the land masses of Earth.
A nautical people travel overland by beast, machine and land yacht.
Great balloons are commonly used on long haul routes, zipping through the jet stream with a minimum of harm to the environment.