Correlation coefficients of air pollutants across 25 districts.
Abstract
<p>Abbreviations: PM<sub>10</sub>, particles with aerodynamic diameter 10 µm or less; SO<sub>2</sub>, sulfur dioxide; NO<sub>2</sub>, nitrogen dioxide; CO, carbon monoxide; O<sub>3</sub>, ozone.</p><p>*<i>p</i><0.05.</pSimilar works
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