This stacked area chart visualizes global CO2 emissions over time, breaking down contributions from gas, liquids, solids, cement production, and gas flaring. It uses an SVG rendering with d3.v4’s `d3.stack`, `d3.area`, and `d3.scaleTime` to construct the layers, with labels positioned by the `d3-area-label` library. The color scale employs `d3.scaleOrdinal` with `d3.schemeDark2`, and hovering a region turns it black. Data comes from a CSV of annual emission gigatons, with axes labeled accordingly.