This example shows a stylized line chart of daily Air Quality Index (AQI) values for Bangor, Maine, plotted over time with circular markers for individual data points. The React-based visualization uses d3.scaleTime and d3.scaleLinear for axes, with d3.line and curveNatural to create a smooth path through the data. Axis components render tick marks and labels via SVG, while marks include tooltips showing pollutant names via SVG title elements. The data is loaded asynchronously from a CSV file using d3.csv.