This example demonstrates how to build a bar chart from a CSV dataset of country populations. The page loads population data from `data.csv` using D3’s `csv` method, then converts the population values to numbers and multiplies them by 1,000. The chart renders in an SVG element using D3 v7, with the data being logged to the console. The visualization shows the comparative population sizes of ten countries, though the bars are not yet drawn, focusing instead on the initial data-loading and transformation steps.