Simplified Techniques in Air Pollution Measurement

There is an increasing interest in pollution of the free atmosphere by airborne gases and aerosols and in evaluating the effects of such pollution on the environment. In many instances, control of air pollution is not undertaken until an environmental insult is proved. Evaluation of the insult generally means a survey which may take several forms. Testimony may be taken of claimed hazards; physiological and materials damage could be assessed; vegetation might be sampled and analyzed for suspected contaminants; or air samples may be collected. In the present state of scientific knowledge concerning air pollution, some information about the presence and concentration of suspected materials in the air is essential for correlation with other observations. There are numerous satisfactory methods available for accomplishing this end.