This reusable scatter plot compares GDP per capita against CO₂ emissions for countries in 2025, with circle size encoding population and color distinguishing regions. Built with D3 v7, the chart renders as SVG and uses d3.scaleLinear, d3.scaleSqrt, and d3.scaleOrdinal to map data dimensions. Interactive tooltips appear on mouseover, showing country details such as renewable energy percentage, while data is loaded from a CSV file.