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The rise of industrialist culture that began in the 1930s heralded the degradation of air quality. This trend would persist for decades, as increasing emissions coincided with the growth in numbers of factories and vehicle ownership. One indicator of such degradation is atmospheric acidity, an increase in which is caused by gaseous and particulate pollutants.
Researchers from the University of Copenhagen’s Niels Bohr Institute (NBI) have found that in recent years, atmospheric acidity is back down to the pre-industrial levels. Using a modified version of Continuous Flow Analysis, they were able to determine the fluctuations in air acidity from year to year.
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