Assess learners' ability to analyze indoor environmental sensor data (CO2, PM2.5, temperature, humidity), interpret results against health and ventilation benchmarks, identify likely sources and occupancy-related patterns, perform simple calculations (e.g., estimating air changes per hour from CO2 decay, assessing PM2.5 exposure risk), and recommend prioritized, practical mitigation strategies (ventilation, filtration, source control, HVAC adjustments) for common indoor settings.