This visualization combines multiple line series and bar charts to show CO₂, methane, and nitrous oxide emissions alongside GDP trends from 1960–2022. The data is loaded from a TSV file using `d3.tsv` with `d3.autoType`. Lines are rendered using `d3.line()` with an ordinal color scale, while semi-transparent bars represent GDP on a right-aligned axis. The SVG chart includes axes, labels, and a tooltip, built entirely with D3 v7.