This interactive SVG world map visualizes the cost of living index per country, using a color gradient from red (low cost) to blue (high cost). It employs D3's `geoNaturalEarth1` projection and `geoPath` to render countries, with data from a CSV file. Users can hover to see country names and click to display a modal with the country's name and index value. The map fetches world atlas data from a URL and processes it with `topojson`.