caption: a plot showing the total concentrations of air pollution
exif: {"Image DocumentName": "Global Atmospheric Concentration of CO2", "Image ImageDescription": "Global Atmospheric Concentration of CO2", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}