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Air pollutant levels depend on emissions but can also be affected by the meteorological situation. We examined air pollutant trends (PM, NO, O and SO) in Slovenia, where in the past the main issue were SO levels. Now, the population is still exposed to PM and ozone levels that are above the recommended levels. Our goal was to assess if the levels of air pollutants were decreasing from 2002 to 2017 due to emission ceilings or were more influenced by changes in the meteorological situation. We modelled the relationship between levels, meteorological parameters, and seasonality and then used the models with the best estimated generalisation to adjust levels for meteorology. Models showed a significant relationship between meteorological parameters and PM, NO, and O levels, but not SO. We analysed trends of raw and adjusted levels and compared them. Trends of PM and SO were decreasing at all locations for raw and adjusted data. The largest decrease was observed in SO levels where the largest decrease in emissions occurred. Trends of NO were also significant and negative at most locations. Levels of O did not exhibit a significant trend at most locations. Results show that changes in the meteorological situation affected PM levels the most, especially where the entire period (2002-2017) could be observed. There is strong empirical evidence that changes in meteorological parameters contributed to the decrease in PM levels while the decrease in NO and SO levels can be attributed to emission ceilings.
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Name: Environmental pollution (Barking, Essex : 1987)
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A type of climate characterized by insufficient moisture to support appreciable plant life. It is a climate of extreme aridity, usually of extreme heat, and of negligible rainfall. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). It may result from natural factors such as changes in the sun's intensity, natural processes within the climate system such as changes in ocean circulation, or human activities.
A climate characterized by COLD TEMPERATURE for a majority of the time during the year.
A climate which is typical of equatorial and tropical regions, i.e., one with continually high temperatures with considerable precipitation, at least during part of the year. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Created 7 April 1992 as a result of the division of Yugoslavia.