This interactive choropleth map visualizes global CO₂ emissions, population, and GDP by country from 1750 to 2023. Users can scrub through years using a slider, hover over countries for tooltips, and switch between the three variables. The visualization uses D3.js for map projection, color interpolation, and slider controls, React for state management, and loads data from filtered_data.csv. Countries are colored with a green-to-red gradient reflecting the selected metric, with the legend adapted to the chosen variable’s unit.