This bar chart displays the populations of ten countries in the year 2000, using horizontal bars colored in light green. The chart is built with React and D3 v5, rendering as an SVG. It uses `d3.scaleBand` for the categorical y-axis (countries) and `d3.scaleLinear` for the quantitative x-axis (population), with tick marks styled via CSS. Population values are formatted using `d3.format` and shown as tooltips. Data is loaded from a remote CSV file and processed with `d3.csv`.