This specimen charts the average greenhouse gas (GES) emission rate against vehicle speed, with point size reflecting carbon monoxide output and color encoding fuel consumption. It also includes tooltips for additional pollutants like NOx and PM10. The visualization is built with the vega-lite-api and d3.v5, fetching semicolon-delimited CSV data from a GitHub repository and rendering to SVG via Vega-Lite. The appearance is customized through a config file, adjusting axes, title, and font styles.