This example shows a world map with countries colored light green, turning orange on hover, and includes a spherical blue background with pan-and-zoom support. It uses D3 v5’s `geoNaturalEarth1` projection, `geoPath`, and `zoom` behavior applied to an SVG group. Country boundaries come from TopoJSON world-atlas data (50m resolution), with names loaded from an accompanying TSV file and added as SVG `<title>` tooltips.