This example shows a natural Earth projection world map, with countries rendered as light green polygons and the surrounding sphere filled in sky blue. It fetches a TopoJSON dataset from a GitHub gist and converts it to GeoJSON using the `topojson.feature` function. The visualization uses `d3.geoPath` and `d3.geoNaturalEarth1` to project and draw the map into an SVG. Country borders are outlined in black with a low stroke opacity to emphasize landmasses without obscuring their fill color.