This example displays an interactive world map using D3.js, with countries rendered as SVG paths filled in green and a blue sphere background. Hovering over a country turns it red, and users can zoom and pan the map via mouse interactions enabled by d3.zoom. The map uses d3.geoNaturalEarth1 projection and d3.geoPath to draw country boundaries from TopoJSON data, while country names are loaded from a TSV file and added as SVG `<title>` tooltips.