This area chart visualizes world population growth over time, using a filled path to show the magnitude of change. The chart plots population (in billions) on the y-axis against a time series on the x-axis, with data loaded from a CSV file via `d3.csv`. The visualization is built with D3 v5, using `d3.scaleTime`, `d3.scaleLinear`, `d3.axisLeft`, `d3.axisBottom`, and `d3.area` with a basis curve. SVG rendering handles the axes, gridlines, and the smooth maroon area path.