The document discusses indoor air quality and outdoor ambient levels of pollutants including nitrogen dioxide. It presents data on average nitrogen dioxide levels measured at roadside and urban outdoor monitoring stations. It also lists the "10 commandments of IAQ" which are principles for indoor air quality including using visual presentation, data logging, computerization, and quantitative and accurate measurement.
25. 10 commandments of IAQ
Visual presentation
Time as a dimension
State-of-the-art technology
Automatic air monitoring
Data logging
Computerization
Information technology
Quantitative
Accurate, precise
Labour saving & cost effective