This visualization displays the 2020 population estimates for the top 30 countries as a horizontal bar chart, with country names on the vertical axis and population values on the horizontal axis, formatted in billions. The React-based code uses d3.scaleBand and d3.scaleLinear for positioning, while d3.csv loads the data from a remote GitHub repository. SVG rectangles render each bar, with tick lines and axis labels styled in blue and green, and tooltips reveal precise population values on hover.