This visualization displays the Keeling Curve, showing monthly average atmospheric CO₂ concentration from Mauna Loa from 1958 onward. The line chart reveals both the seasonal oscillations and the steady upward trend in carbon dioxide levels over time. It uses D3 v7’s `scaleTime`, `scaleLinear`, and `line` generators for the chart, with custom axis and label functions. Data is loaded from a CSV file, parsed with `csvParse`, and dates are converted using `timeParse` before being rendered as an SVG path.