This area chart visualizes global population growth from 1960 to 2015, using a smooth filled path to emphasize the upward trend. The visualization is rendered as an SVG using D3 v5, with a time-scaled x-axis for years and a linear y-axis for population, formatted in billions. Data is loaded from a CSV file, and the area generator uses `curveBasis` to create the spline-based shape, with custom axis labels and grid lines.