This example displays an interactive world map with countries rendered in light green and hover effects that change their color to red. It uses d3.geoNaturalEarth1 for projection and d3.geoPath to draw geographic features from TopoJSON data loaded from the world-atlas package, with country names joined from a TSV file. Pan and zoom functionality is implemented via d3.zoom, and the map is rendered as SVG with a light blue sphere background.