This example shows a horizontal bar chart of the populations of 20 countries in 2010, ordered by country name. The chart uses D3’s `scaleBand` and `scaleLinear` to map countries and population values to SVG rectangles, with axes built from custom React components. Population values are formatted with D3’s `format` function, converting values like “1.2G” to “1.2B”. The data is loaded asynchronously from a CSV file via `d3.csv`, and the rendering is done through React with SVG, using a light green fill for the bars and tooltips provided by SVG `<title>` elements.