This bar chart displays the 2020 populations of 30 countries, sorted by country name, using horizontal bars with a green fill and blue tick marks. The React app loads CSV data from a GitHub URL via `d3.csv`, transforms raw numbers by multiplying by 1000, and renders with `scaleBand` and `scaleLinear`. Axis labels use D3’s `format('.2s')` to abbreviate values, and each bar includes a native SVG `<title>` tooltip. The layout is static, with margins and dimensions fixed in the code.