This bar chart ranks the 20 most populous countries based on 2010 population data, sourced from a remote CSV file. The visualization displays horizontal bars ordered by country, with a linear x-axis scaled in billions and a categorical y-axis for country names. Built with React and D3 v5, it uses `scaleLinear` for the quantitative axis, `scaleBand` for the categorical axis, and renders vector graphics through SVG with custom tick formatting that converts gigabytes to billions.