This example displays a natural Earth projection world map, with continents rendered in green against a blue ocean sphere. It uses D3 v5’s `geoNaturalEarth1` projection and `geoPath` to draw country boundaries from a TopoJSON dataset, accessed via a GitHub gist URL. The map loads and renders geographic features as SVG paths, with the sphere outline generated from a GeoJSON sphere object. Country shape styling uses CSS classes for fill and stroke.