This example displays a choropleth-style map of the United States, with each state rendered as a green filled path and internal borders drawn in teal. It uses the `geoAlbersUsaTerritories` projection from the `geo-albers-usa-territories` package to show all states including territories. The geographic data comes from the `us-atlas` TopoJSON file, processed through TopoJSON’s `feature` and `mesh` functions. The visualization is built with React and D3’s `geoPath`, rendering purely as SVG elements within a 960x500 viewport.