This example displays a pie chart of the top 10 countries by deaths from air pollution in 2020, using a legend with colored squares and text labels to list each country and its corresponding value. The visualization fetches CSV data from a GitHub gist via `d3.csv`, processes the numeric “Annualincome” field, and renders SVG paths using `d3.pie` and `d3.arc` with a zero inner radius. A `scaleOrdinal` maps categorical values to a fixed array of colors, while `d3.format` customizes the legend’s numeric labels.