This interactive visualization displays monthly air quality measurements for London, plotting PM2.5 and PM10 particulate levels with a scatter plot that morphs into a line chart. The line chart uses d3.line with curveBasis to connect data points, while the color legend and dropdown menus allow filtering by month and selecting different measurement variables. Data comes from King's College London air quality datasets, rendered as SVG with animated transitions that transform the scatter plot points into a continuous line. Users can click legend items to highlight specific months in the multicolored inferno-scaled visualization.