{"version":"1.0","type":"rich","title":"testing Keeling Curve","description":"This visualization reproduces the Keeling Curve, plotting average monthly atmospheric CO₂ concentration from 1958 to the present. The line chart displays the characteristic upward and seasonal sawtooth pattern of carbon dioxide measurements. The visualization uses D3 v7's `d3.line` for the path, `d3.scaleTime` for the time axis, and `d3.timeParse` to convert year and month strings into JavaScript `Date` objects. Data comes from NOAA's Global Monitoring Laboratory, loaded from a CSV file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/89e8c7ebd3474c20ba47a8352461eac5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}