This example demonstrates how to create a world map using D3.js, displaying a blue sphere with a natural Earth projection and a green landmass rendered as SVG paths. The visualization uses `d3.geoPath` with a `d3.geoNaturalEarth1` projection to draw the sphere outline, while TopoJSON data is loaded from an external URL using `d3.json` and processed with TopoJSON’s `feature` method. The code imports specific D3 modules like `select`, `json`, `geoPath`, and `geoNaturalEarth1`, and styles the sphere and country paths via CSS classes.