This visualization is a pie chart showing the Air Quality Index by country, with each slice representing a country and its color encoded to a categorical scale. The chart includes a legend on the right side listing each country with its corresponding Air Index value, and the slices are sorted from largest to smallest value. Built with D3 v5, the code uses `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` to generate the SVG paths and colors. The data is loaded from a remote CSV file using `d3.csv`, with the `Air_Index` values parsed as numbers for the computation.