{"version":"1.0","type":"rich","title":"Multiple Line plot with Dropdown","description":"This visualization displays monthly air quality measurements for London from 2010 to 2018, showing how different pollutants like PM2.5, PM10, and ozone vary over time. A dropdown menu lets users switch between pollutant types, while multiple colored lines represent different years. The chart uses d3.line with curveBasis for smooth paths, d3.scaleTime and d3.scaleLinear for axes, d3.nest for grouping data by year, and d3.transition for animated line updates. Data comes from the London Datastore, rendered as an SVG with a color legend.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/9b2ada483cf341218ce37b4ee3879f63?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}