{"version":"1.0","type":"rich","title":"Gist f122bb03086cd80b0d17","description":"A choropleth map displays particulate matter (PM2.5) pollution levels across North American regions for each year from 2000 to 2012, with color-coded polygons indicating concentration ranges. The visualization uses CartoDB.js to render the map and includes an interactive year selector that switches between temporal layers. A tooltip shows city-level data, while a separate toggle displays or hides point markers for cities, each styled with graduated color scales based on PM2.5 values.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-f122bb03086cd80b0d17?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}