This example displays a static bar chart of country populations, with rectangles sized at a fixed width and height rather than scaled to the data values. It uses D3 v3’s `select`, `csv`, and `selection.data` to load `data.csv`, convert the `population` field to numbers via `forEach`, and append rectangles to an SVG. The chart is incomplete, showing no axis or value encoding, and the `styles.css` file is unused. The code also logs messages to the browser console from the HTML and JavaScript files.