Research on the spatial and temporal patterns of ozone concentration and population health effects in the Central Plains Urban Agglomeration from 2017 to 2020.

(2) The ozone concentration of the Central Plains urban agglomeration showed a decreasing trend throughout the year and during the warm season from 2017 to 2020, there are two peaks monthly, one is June, and the other is September.

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Based on the results, θ slope >0 indicates an increasing trend, whereas θ slope <0 indicates a decreasing trend. 3.

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