This horizontal bar chart displays the 30 most populous countries in 2020, with bars representing population values and a tooltip showing formatted numbers on hover. The visualization loads CSV data from a GitHub-hosted dataset, processes the population values by removing commas, and sorts countries in descending order before capping at 30 entries. Built with D3 v6, it uses `scaleLinear` for the x-axis, `scaleBand` for the categorical y-axis, and custom `AxisBottom` and `AxisLeft` components to render the axes. The chart includes blue grid lines, light green bars, and a formatted x-axis label that converts billions to a readable format.