Every @Belter settlement exists within an environment that can become lethal through a single mechanical failure.
Air is recycled. Water is measured. Heat is controlled. Food must be grown, processed, or imported. A damaged seal, contaminated reservoir, or neglected filtration unit can endanger an entire community.
Belters learn these realities from childhood. Basic maintenance, emergency procedures, pressure safety, and resource conservation are considered essential knowledge rather than specialized skills.
Waste is treated with contempt. Water left running, food discarded, or equipment abandoned may provoke genuine anger. Objects are repaired repeatedly, modified for new purposes, and passed between generations.
On a planet, wealth may be measured in land or currency. In @The Belt, wealth begins with access to air, water, power, and a secure place to sleep.