This visualization displays the top 20 countries by population in 2010 as a horizontal bar chart, using an SVG rendering with React and D3 v5. The bars are color-coded green and include tooltips showing the population values. The x-axis is scaled using `d3.scaleLinear` with a custom SI format that converts values from billions to millions, while the y-axis uses `d3.scaleBand` for categorical country labels. The data is loaded from a CSV file using D3's `csv` method and processed with custom row parsing. The chart includes styled axes and labels, with the x-axis labeled "POPULATION-2010".