This visualization reproduces the Keeling Curve, showing the monthly average atmospheric CO2 concentration from 1958 onward. The line chart displays a clear upward trend in CO2 levels over time, with the seasonal fluctuations visible in the data. The code uses d3.line to generate the path and d3.timeParse with the format '%Y-%m' to convert date strings into JavaScript Date objects, with axes rendered using d3.axisLeft and d3.axisBottom. Data comes from the Global Monitoring Laboratory’s Trends in Atmospheric Carbon Dioxide dataset.