{"version":"1.0","type":"rich","title":"Fork of  London Air","description":"This interactive scatter plot visualizes monthly air quality measurements from the London Datastore (January 2010–August 2018), showing pollutant levels over time. Users can select which pollutant to display on the y-axis via a dropdown menu, while the color legend encodes the month and a second legend distinguishes Roadside versus Background measurement types. Built with D3 v5, the visualization uses `scaleOrdinal`, `scaleTime`, and `scaleLinear` for encoding, with clickable legends, animated transitions, and interactive tooltips. The color legend supports filtering by clicking, and the stroke legend uses `transition.attrTween` for updates.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c96deaa921ad4930a3a5e35dbfd10054?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}