This bar chart visualizes population by country using data from the UCI Machine Learning Repository’s Auto MPG Data Set, loaded via `d3.csv`. The visualization is built with the Vega-Lite API, which registers Vega and Vega-Lite libraries, and renders as an SVG using `vega-lite-api`. It encodes country on the x-axis and population on the y-axis, with tooltips showing population values. The chart uses a custom config to enlarge font sizes and adjust axis styles, and it fits the viewport dimensions with an autosize setting.