This example displays a world map rendered as an SVG, with countries filled in light green against a blue ocean background. It uses D3.js version 5 to load geographic data from the World Atlas TopoJSON file and convert it to GeoJSON features. The map is drawn with the `d3.geoPath` and `d3.geoNaturalEarth1` projection, while `topojson.feature` extracts country boundaries from the dataset. The code appends paths for the sphere and each country, applying basic styling from an external CSS file.