This is a horizontal bar chart displaying the 2020 populations of 30 countries, loaded from a CSV file and sorted from largest to smallest. The visualization is rendered as an SVG using React and D3 v5, with `scaleBand` for the categorical y-axis, `scaleLinear` for the numeric x-axis, and custom `AxisBottom` and `AxisLeft` components for ticks. Green rectangles represent data values, with tooltips showing the formatted population in billions. The chart is part of a React app using `useData` to fetch and parse the data, with axes styled via CSS.