This example displays an interactive world map using an equirectangular projection, with countries rendered in green and a blue ocean sphere. The map loads geographic data from a world-atlas TopoJSON file and visualizes it as SVG paths. Built with D3 v5, it uses `d3.geoEquirectangular` and `d3.geoPath` for projection and path generation, and TopoJSON's `feature` method to convert the data into GeoJSON features. Hovering over a country highlights it in red via CSS.