This choropleth map displays world countries colored in light green against a blue globe, with red highlighting on hover. The visualization uses a natural Earth projection via `d3.geoNaturalEarth1` and renders geographic features with `d3.geoPath`. Country boundaries and identifiers come from the World Atlas TopoJSON dataset, while country names are joined from a TSV file. Interactive tooltips show each country’s name through appended SVG `<title>` elements, and the map supports zooming via D3’s zoom behavior.