{"version":"1.0","type":"rich","title":"Pie Chart (CO₂ Share by Region, 2025)","description":"A pie chart displays the estimated share of global CO₂ emissions by region for 2025, with five categories (Asia, Europe, Americas, Africa, Oceania) derived from country-level data mapped to regions. Each slice is colored via `d3.scaleOrdinal`, and percentage labels are placed using `d3.arc` centroids. A hover tooltip shows the regional share. The visualization uses D3.js v7 to load CSV data from a GitHub gist, compute aggregates with `d3.rollup`, and render the chart as SVG elements with an interactive HTML legend.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b5b43305217f4b4d9c3f7ba678459464?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}