This example displays a natural Earth projection map of the world, with countries rendered as light green SVG paths and the ocean sphere filled in blue. It loads geographic data from the world-atlas TopoJSON dataset using `d3.json`, converts the TopoJSON features to GeoJSON with `topojson.feature`, and projects them via `d3.geoNaturalEarth1` and `d3.geoPath`. The sphere outline is drawn using a GeoJSON Sphere object.