This bar chart displays the 2020 population estimates for 30 countries, ordered by country name along the vertical axis and population magnitude along the horizontal axis. Built with React and D3 v5, the visualization uses SVG rectangles for the bars and custom axes. The `csv()` function loads the data, while `scaleBand()` and `scaleLinear()` map the categorical and continuous values. Hovering over a bar reveals a tooltip with the population formatted in billions via D3's `format()`.