The histogram in Figure 1 a shows that the population age distribution had a clear trend toward a normal distribution, with the largest number of people in the 37–56 age group and the smallest number of people aged 77 years and older. 3.1.2.
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Impacts of Social Inequality, Air Pollution, Rural-Urban Divides, and Insufficient Green Space on Residents' Health in China: Insight from Chinese General Social Survey Data Analysis.
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