This example renders an equal-Earth projection world map using React and D3 v5. The visualization displays landmasses in teal, country borders as thin strokes, graticules, and a light gray sphere background. It loads GeoJSON data from the world-atlas TopoJSON source, converting it with `topojson.feature` and `topojson.mesh`. The SVG paths are generated with `d3.geoPath` and `d3.geoEqualEarth`, while `geoGraticule` creates the grid overlay.