This interactive world map visualizes renewable energy usage and CO₂ emissions for 12 major countries in 2024. Users toggle between the two metrics via buttons, triggering smooth color transitions across the geography. The visualization uses d3.geoNaturalEarth1 projection with d3.geoPath to render countries from TopoJSON data, while d3.scaleSequential with interpolateGreens and interpolateReds drives the color encoding. Hover tooltips display detailed country statistics via mouse events. The SVG rendering includes an ocean-colored sphere background and grayscale borders for non-data countries.