Air quality is crucial for human health and welfare. A large number of studies have indicated strong

associations between ambient air pollution levels and adverse health effects. There is a considerable number

of literature reports concerning changes in atmospheric greenhouse emissions, while relatively little is known on

changes in atmospheric CO emissions. This paper presents the rate of changes in atmospheric CO emissions using the

logarithmic method in the assessment of this rate. Studies were conducted based on source data from 32 Organization

for Economic Cooperation and Development countries. Analyses covered the period of 2005–2012. It was found that

the average rate of changes had a negative average rate for most, although not all analyzed countries. In three of the

32 countries atmospheric CO emissions increased in that period. While the intensity of these changes varied, a defi nite

majority of the countries reduced their CO emissions, whereas Turkey, Poland and Estonia increased their emissions.