This example displays a natural Earth projection of world countries as light green polygons with black outlines against a blue sphere, rendered as SVG paths. The visualization loads GeoJSON country boundaries from the world-atlas package, converts them using the topojson `feature` function, and projects them with `d3.geoNaturalEarth1` and `d3.geoPath`. The sphere background is drawn first, followed by the country paths, both styled via CSS classes.