This bar chart visualizes the 2020 population estimates for the top 30 countries, sorted by country name. The horizontal bars are rendered as SVG rectangles using React, with the D3 library's `scaleBand` and `scaleLinear` functions handling the axis mappings. Data is loaded from a remote CSV file via the `d3.csv` function, and axis ticks and labels are generated with custom React components. The chart includes a fixed color scheme and a tooltip that displays the formatted population value.