This example shows a world map rendered as an SVG, with countries filled in light green and oceans in blue using a Natural Earth projection. It loads GeoJSON country boundaries from the world-atlas TopoJSON dataset and converts them with the `feature` method from TopoJSON. The visualization uses `d3.geoPath` with `d3.geoNaturalEarth1` to draw the sphere outline and country paths, with styling applied through CSS classes.