This example renders a world map using the Natural Earth projection. It draws a blue sphere as the globe’s background, then fills each country with a light green color and subtle black strokes. The visualization loads geographic data from the world-atlas TopoJSON file, converts it using `topojson.feature`, and projects it with `d3.geoNaturalEarth1` and `d3.geoPath`. The SVG output is generated entirely through D3’s selection and data-join methods.