{"version":"1.0","type":"rich","title":"Keeling Curve","description":"This example reproduces the Keeling Curve, a time series line chart showing monthly average atmospheric CO₂ concentrations from 1958 onward. The visualization displays the data as a continuous black line, with axes for year and CO₂ concentration labeled accordingly. It uses D3 v7 APIs including `d3.line`, `d3.scaleTime`, `d3.scaleLinear`, and `d3.timeParse` to parse and plot the data. The dataset comes from the NOAA Global Monitoring Laboratory’s Trends in Atmospheric Carbon Dioxide.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d3157d7eff1b4b99b2c591ecc7076ce8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}