This pie chart displays the top 10 countries by deaths from pollution, using a detailed legend to map each country to its slice and value. The visualization is built with D3 v5, fetching its data from a CSV file and rendering the chart as SVG. The code explicitly uses `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` to compute the pie segments and colors, while the legend is constructed with appended SVG groups and rectangles. Text labels on each slice show the death count in thousands, formatted with `d3.format('.4~g')`.