This example presents the Keeling Curve dataset, showing monthly atmospheric CO2 concentrations from Mauna Loa and Maunakea, Hawaii. It displays raw, seasonally adjusted, fitted, and filled measurements in a preformatted JSON structure. The code loads data from a CSV file, parses dates using the JavaScript `Date` constructor, and converts missing values to `NaN`. The visualization simply renders the first data row as formatted text, demonstrating how to import, clean, and inspect structured scientific data for further analysis.