{"version":"1.0","type":"rich","title":"Fork of PM 2.5 Particle Change in US","description":"This interactive choropleth map shows the change in PM2.5 particulate matter concentrations across US counties from 2000 to 2018. A vertical slider and play button animate through years, with counties colored on a sequential YlGnBu scale where darker blue indicates higher pollution levels. The visualization uses D3 v5 geo projections via `d3.geoIdentity` and `d3.geoPath` to render TopoJSON county boundaries from the US Atlas, with React managing the state and year updates. County-level PM2.5 data comes from a CSV file, and hover tooltips display exact values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7b8e42ccbec04d9989ccbbe9cb698f0b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}