Fig. 1From: Air pollution, residential greenness, and metabolic dysfunction biomarkers: analyses in the Chinese Longitudinal Healthy Longevity SurveyThe NDVI and PM2.5 level in the eight sample districts. Note: We used “ggplot2” and “sf” packages in R 4.0.0 (URL https://www.R-project.org/) to draw the mapBack to article page