This horizontal bar chart displays the population of the top 30 countries in 2020, using a linear scale for population values and a band scale for country names. Each bar is rendered as an SVG rectangle with a lightgreen fill, while the axes include formatted tick labels that abbreviate millions as "M" and billions as "B". The visualization loads data from a remote CSV file using `d3.csv`, and constructs the chart with `d3.scaleLinear`, `d3.scaleBand`, `d3.axisBottom`, and `d3.axisLeft` within a 900x500 SVG canvas.