This example displays a world map with every country rendered as a light green SVG path with black borders on a blue background. It uses d3-geoNaturalEarth1 and d3.geoPath to project and draw the geographic features, pulling country boundaries from the world-atlas TopoJSON dataset. The code loads the data asynchronously, converts TopoJSON to GeoJSON with topojson.feature, and appends the resulting paths to the SVG.