This bar chart visualizes carbon emissions by car make year from 2013 to 2022, with values displayed above each bar. Hovering over a bar highlights it and displays the numeric difference from the selected year’s value. The visualization uses D3.js v5 with SVG rendering and transitions. It scales the y-axis for CO2 emissions in g/km, and incorporates `d3.scaleBand`, `d3.scaleLinear`, and axis functions for grid lines and labels.