This example displays a world map rendered as an SVG using the Natural Earth projection, with each country drawn as a blue-stroked path on a green background. It retrieves GeoJSON data from the world-atlas TopoJSON dataset and converts it using the `feature` method from the topojson library. The code applies `d3.geoPath` with a `geoNaturalEarth1` projection to generate the country outlines, and uses React to structure the visualization.