33.5 tonnes
Approximate metabolic oxygen demand per sol for the physically present population.

Humanity's clean, orderly proof of permanent settlement. A real home inside a proprietary survival machine.
Continuity One is the central inhabited settlement within the wider port-city of Providence Planitia. Ordinary survival is underground, under berm, beneath printed arches, or behind water and waste mass. A room with a view is not a miracle. It is shielding mass, maintenance, routing, and privilege.
The public city sells gardens and glass. The lived city is ducts, pressure doors, schools, clinics, workshops, queue logic, and the people who know which temporary bypass became permanent three years ago.

Green space is public health, humidity control, carbon exchange, water load, food, prestige, and a maintenance schedule.
Class does not require different oxygen percentages. It lives in airflow per bed, carbon-dioxide peaks, humidity, fan noise, recovery time, redundant trunks, quiet exercise access, clinic priority, and who can reach shelter before a door closes.
Harmony targets carbon dioxide below 900 ppm. Betterment commonly runs between 1,150 and 1,450 before the system calls it an incident. Settlement averages make both districts appear safe.

Housing, work, school placement, clinic access, and return passage share one badge.
Approximate metabolic oxygen demand per sol for the physically present population.
The life-critical floor. Everything above it is where politics begins.
Planning mean per person per sol. Biomass, edible yield, and dinner are separate ledgers.
Routine recovery under healthy conditions. A high percentage is still not a reserve.