This interactive bar chart shows the population of the top 10 countries in the year 2000. Built with React and D3 v5, the visualization uses `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis. Data is loaded from a remote CSV using D3's `csv` function, with each bar rendered as an SVG `<rect>`. Axis ticks are generated via D3's scale `ticks()` method, and the x-axis labels are formatted with `format('.2s')` to convert values to billions. A hover tooltip displays the precise population value.