This visualization displays population data for ten countries in the year 2000 using a horizontal bar chart rendered as SVG. The chart ranks countries from top to bottom by population, with green bars sized linearly to population values and formatted axis labels converting large numbers to billions. The React app loads CSV data from a GitHub repository using d3.csv, then applies d3.scaleBand for the categorical y-axis and d3.scaleLinear for the numeric x-axis. Tooltips on each bar show the exact population value via SVG title elements.