This example shows a horizontal bar chart ranking the populations of ten countries in the year 2000, using a dataset loaded from a GitHub-hosted CSV file. The bars are rendered as SVG rectangles via React components, with D3’s `scaleBand` and `scaleLinear` mapping country names and population values to positions and lengths. Axis components generate ticks and labels, while a `format` function converts numbers into abbreviated units like billions. The code initializes data asynchronously with `useEffect` and `csv`, and applies a custom CSS style for tick lines and bar fills.