This example visualizes the monthly average atmospheric CO₂ concentration from the Mauna Loa dataset, spanning from 1958 onward. It renders a line chart on a dark background, with individual data points drawn as small, randomly colored circles, alongside a connecting line. The chart uses d3’s `scaleTime` and `scaleLinear` to map the date and average value to the plot area, with custom axis labels. Data is loaded from a local CSV file and parsed using d3’s `csvParse` and `timeParse`.