This horizontal bar chart displays the 2010 population for the top 20 countries, using a light green fill for each bar. Country names appear on the y-axis, while the x-axis measures population in billions, formatted with D3’s `.format` method. The chart is built with D3 v7, using `d3.scaleLinear` and `d3.scaleBand` to map data, and renders as an SVG. Data is loaded from a CSV file hosted on GitHub, filtered to the first 20 rows.