This stacked area chart visualizes global CO2 emissions over time, broken down by fossil fuel type: gas, liquids, solids, cement production, and gas flaring. The data is sourced from a cloud.json file and filtered to show years after 1790. Built with D3 v4, the visualization uses `d3.stack` and `d3.area` to render the SVG paths, with `d3.areaLabel` positioning text labels within each segment. The chart updates responsively on window resize, and hovering over a segment turns it black.