This visualization shows global population growth over time as a smooth, filled area chart. It uses D3 v5 with `d3.csv`, `d3.scaleTime`, `d3.scaleLinear`, and `d3.area` with `curveBasis` to generate the SVG path. The data comes from a CSV file provided via VizHub, with population values formatted in billions. Axis labels, ticks, and a title are added using `d3.axisBottom` and `d3.axisLeft`.