This visualization displays the top 10 most populous urban regions or countries projected for 2050 as horizontal bars without axes. The chart uses React hooks (useState, useEffect) to asynchronously load and parse United Nations Urban Population Prospects 2018 data via d3.csv. d3.scaleBand and d3.scaleLinear position bars, with widths mapped to population values using d3.max. The SVG rendering includes only rectangles, omitting scales, ticks, and labels.