This pie chart visualizes the top 8 countries with the highest death tolls from air pollution, using data from a CSV file. The chart displays the proportional share of deaths for each country, with labels showing values in thousands and a legend mapping colors to country names. The visualization is built with D3 v5, using the `pie()` generator to compute arc angles and `arc()` with an inner radius of zero to draw segments. Text labels are positioned at arc centroids, while the legend is constructed manually using appended SVG elements.