This area chart displays the yearly average Fahrenheit temperature using a green-filled path. The visualization loads its data from a GitHub gist via `d3.csv` and maps the year and temperature values to the x and y axes using `d3.scaleLinear` with `d3.extent`. The SVG rendered with D3 v6 shows the area between the baseline and the temperature line, complemented by themed axis labels and a distinct fill color.