This example displays a world map using the Natural Earth projection, with countries filled in light green against a dark blue sphere. It loads GeoJSON country boundaries from the world-atlas TopoJSON dataset via `d3.json` and converts them with `topojson.feature`. The SVG paths are generated using `d3.geoPath` and `d3.geoNaturalEarth1`, with styling applied through CSS classes for the sphere and individual countries.