This 3D bar graph visualizes population data by age group, with bar height encoding male population values in millions. The visualization uses the d3-x3d library to render three-dimensional bars within an X3DOM scene, while D3 v5 handles CSV parsing and data binding. The chart initially displays random test data before loading the actual population dataset from a GitHub gist, then updates the scene with the real values. The page includes a light green title and sky blue background for visual context.