This example uses the Vega-Lite API with D3 to render a bubble chart of religious populations by country, sourced from the UCI Auto MPG dataset via a Gist. The visualization encodes country on the x-axis (sorted by descending population), religion on the y-axis, and population size as the bubble area, with tooltips for exact values. Code loads data via `d3.csv`, configures axes and styles through a `config` object, and renders an SVG using `vl.markCircle` with `vl.encode`, all orchestrated through `vega-lite-api` and `vega-tooltip`.