This area chart visualizes world population growth over time, using a smooth curve to highlight the upward trend. The data is loaded from a CSV file, and each year's population is mapped to vertical height. Built with D3 v5, the visualization uses `scaleTime`, `scaleLinear`, `area` with `curveBasis`, and `axisBottom`/`axisLeft` to render the SVG. The y-axis labels are formatted from billions (G) to (B), and gridlines are drawn via tick sizes.