This example displays world population trends over time using an area chart, with the x-axis representing years and the y-axis showing population counts. The visualization renders as an SVG with a maroon, partially transparent filled area and axis labels. The code uses D3 v5 APIs including `scaleTime`, `scaleLinear`, `area`, `axisBottom`, `axisLeft`, and `curveBasis` for smoothing, and loads population data from a CSV file. The dataset spans multiple years, with values formatted using `d3.format`.