Planet part of the Sirius System, the most technologically advanced planet, required a set up of multiple ozone-emitting pillars to strengthen the atmosphere due to its closeness to the blue sun.
Reuse - largest city on Pier. Built on top of a pillar. Formerly the largest exporter of goods from pier. Has trains to Partil Partil - Sister city to Pier. Built on a neighboring pillar. This city provides the remnants of its manufacturing force for pier.
One food shipment every ~2 months Atmosphere held up by the Pillars, which still appear to be working
Pier is the most technologically advanced planet in the system. This is a byproduct of all the research required to terraform the planet. Multiple ozone-emitting pillars build a thick atmosphere that is resilient to the harsh rays of the start Sirius. This provides the insulation necessary to host life and humanity on the planet.