The laboratory models need to measure how the pollutant concentration changes with position and time.

Measures of pollutant concentration are used to determine risk assessment in public health.

Chemical techniques may be used to determine pollutant concentrations and their effects.

Air pollutant concentrations were higher inside vehicles than outside.

The average pollutant concentrations were similar in air samples from various outside micro-environments.

It was also reported that pollutant concentrations were being affected by the change in the make up of the vehicle fleet.

But the relationship between pollutant concentrations and ventilation rates has proved particularly controversial.

Air circulation and moisture levels can affect indoor pollutant concentrations as well.

Minimum, maximum, median and mean levels; of pollutant concentration were calculated.

It is based on the highest pollutant concentration, relative to the air quality objectives, at each monitoring site.

The peak pollution lasts for about one day, and the pollutant concentrations return to background levels after 24 hours.

Since then, for the first time in Indian history, major air pollutant concentrations have dropped in every 5-year period.

Some of the most common parameters mapped in profile are air pollutant concentrations and sound levels.

The air quality index is a piecewise linear function of the pollutant concentration.

Air pollutants concentrations show significant variation from day to day and between different times of day.

Air pollutant concentrations varied at different times of day and differed in winter and summer.

Vehicles were the dominant source of the measured air pollutant concentrations in the roadside measurements.

This unit is used to represent pollutant concentrations.

For example, as emissions increase, it is usually expected that ambient pollutant concentrations would increase.

However, 10 km of altitude is sufficient for most purposes involving air pollutant concentrations.

You'll need the following data on background pollutant concentrations to carry out the screening tests:

Three levels of objective exist for pollutant concentrations: desirable, acceptable, and tolerable.

A part of the external surface of a target with homogeneous pollutant concentration.

This is because the relationship between short-term pollutant concentrations and meteorology is more complex.

Air quality laws are often designed specifically to protect human health by limiting or eliminating airborne pollutant concentrations.