This choropleth map displays world countries colored in light green against a blue sphere, with hover highlighting in red. It uses a natural Earth projection via `d3.geoPath` and `geoNaturalEarth1` to render country boundaries from TopoJSON data sourced from the world-atlas package, paired with a TSV file for country names. Pan and zoom interactions are enabled through `d3.zoom`, while tooltips show country names via SVG `title` elements.