This horizontal bar chart shows the populations of various countries in millions, sorted from smallest at the top to largest at the bottom. The bars are stacked to display the estimated religious breakdown of each country for 2010, with a legend that highlights individual religions on hover. It uses d3’s `scaleOrdinal` for color encoding, `scaleLinear` and `scaleBand` for axes, and `stack` for the stacked layout. Data comes from the Pew Research Center’s Global Religious Landscape, processed via a script and rendered using `@curran/responsive-axes` for chart anatomy.