This example visualizes a world map using a natural Earth projection, rendering countries as light green paths with dark strokes on a blue spherical backdrop. It loads geographic data from a world-atlas TopoJSON file via `d3.json`, then applies the `topojson` library’s `feature` function to extract country features. The SVG paths are generated using `d3.geoPath` and the `d3.geoNaturalEarth1` projection, which also draws the sphere outline. The input data source is the unpkg-hosted world-atlas dataset, and the rendering is entirely vector-based, using SVG elements styled by the included CSS.