Common Breath Plant

Turns algae feedstock into oxygen cartridges for homes.

A compact basalt (#34383C) factory block is crossed by an enclosed pressure-aluminum (#B5BAB7) bridge gallery and a diagonal signal-red (#C53F35) stair tower that climbs its side, with three upright glacial-blue (#A9CFD9) cartridge silos standing in one row across the back. The bridge gallery runs side to side, from the block to the stair tower at its right end. The roof is flat.

The flat front wall carries one bold relief panel in red enamel: two large gloved hands passing one oxygen cylinder between them, cut in a few broad planes whose outline reads against the dark basalt. Beneath it, a red door in a deep aluminum frame.

The diagonal stair and the three bright silos climb above the low housing.

Scale: longest ground side about 2.5 city tiles, with the main entrance on the front face.