Complex sentence: The crew wear "smartsuits", robotic spacesuits capable of independent operation; the suits are also the only source of oxygen, as the mining company does not provide an oxygen atmosphere inside the station, and every activity is measured in breaths.
Split into simpler sentences: The crew wear "smartsuits", robotic spacesuits capable of independent operation. The suits are also the only source of oxygen, as the mining company does not provide an oxygen atmosphere inside the station, and every activity is measured in breaths.