However, an increasing trend occurred in Białystok, Bydgoszcz, Gorzów Wielkopolski, Poznań, Katowice, and Warsaw.
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Impact of PM<sub>2.5</sub> and NO<sub>2</sub> concentrations on mortality in 13 major polish cities.
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The sentences
In most of the analysed cities, annual average PM 2.5 concentrations showed a decreasing trend from 2010 to 2019.