2.18. Lunar Settlement Infrastructure
   2.18.1. Life Support Utilities
      2.18.1.1. Atmosphere Systems
      2.18.1.2. Water Utilities for the Lunar Settlement
      2.18.1.3. Food Systems
      2.18.1.4. Radiation Protection
      2.18.1.5. Thermal Control Systems
      2.18.1.6. Contamination Control
      2.18.1.7. Waste Management