This example shows a basic world map with all countries rendered as green SVG paths with white borders on a light blue background. It loads GeoJSON country boundaries from a remote TopoJSON file and projects them using the Natural Earth projection. The code uses D3 v5’s `geoPath` and `geoNaturalEarth1` alongside the TopoJSON `feature` API to convert TopoJSON topology into GeoJSON features. Country paths are appended to the SVG via a data join, with no interactivity or additional styling beyond the static filled shapes.