This area chart displays pollutant emissions (CO and NOx) over time from a CSV dataset of USA pollution records. Two overlapping filled paths, one orange and one blue, show each pollutant’s annual values using d3.area with curveBasis smoothing, scaled by d3.scaleTime and d3.scaleLinear. The SVG rendering includes custom axes with tick formatting, labels, and a red title, all built with d3 v5 and styled via CSS.