This example displays a world map using a Natural Earth projection, with countries rendered as filled green SVG paths outlined in black. The visualization loads country boundary data from the world-atlas JSON dataset and projects it onto a blue sphere background. The code initializes a D3 geo path generator with the `geoNaturalEarth1` projection and uses the `topojson` feature function to parse the GeoJSON data. Countries are drawn by passing each feature to the D3 `geoPath` generator, which constructs the appropriate SVG path data.