This area chart visualizes world population growth over time, using a smooth, filled curve to trace the data from historical years up to 2015. The visualization, rendered as an SVG, relies on D3.js’s `area`, `curveBasis`, `scaleTime`, and `scaleLinear` APIs to construct the chart, with axes formatted using `axisLeft` and `axisBottom`. Population values are read from a CSV file hosted on VizHub, and the title, axis labels, and tick marks are styled via a linked CSS file.