This example displays a world map with green landmasses, black country borders, and an aqua ocean rendered as SVG. It uses `d3.geoNaturalEarth1` and `d3.geoPath` to project and draw geographic features, with `topojson.feature` extracting country polygons from a world-atlas TopoJSON source. The code also appends a sphere path to outline the globe, with styling controlled by CSS classes.