This chart displays the top 30 countries by 2020 population as a horizontal bar chart, with country names on the y-axis and population values on the x-axis in billions. The visualization is rendered as SVG using React and D3 v5, employing `scaleBand` for the categorical axis and `scaleLinear` for the quantitative scale. The code fetches CSV data from a remote URL, formats population values with `d3.format`, and includes basic interactivity through SVG `<title>` tooltips showing exact values.