This choropleth map visualizes world population estimates for each country, with a color scale ranging from light red to dark red. The map renders geographic boundaries using `d3.geoPath` with a Mercator projection, and supports zooming via `d3.zoom`. Population data comes from a TSV file and country shapes from TopoJSON, both sourced from the world-atlas package. Countries display hover effects through CSS, changing fill color to purple, and show country names via SVG `title` elements.