This bar chart visualizes the population of the top 10 most populous countries, using 2018 estimates from the UN’s World Population Prospects. The chart uses a linear scale for the population axis and a band scale for country names, with custom tick formatting that converts SI units (e.g., G to B). Population values are scaled by 1000. The D3 code removes default domain lines and tick marks, adds axis labels, and renders the bars in SVG.