This bar chart visualizes the average share of electricity production from renewables across EU member states from 2012 to 2020. Each bar is colored using a linear color scale to encode the year-over-year percentage change, with a legend displaying the percentage format. The chart is built with D3 v7, using `d3.scaleBand` for the x-axis, `d3.scaleLinear` for the y-axis and color encoding, and `d3.legendColor` for the color legend. Data originates from a CSV file, and hovering over a bar reveals its change percentage.