This example displays the top 10 countries with the highest CO2 emissions in 2019 as a horizontal bar chart, using a dataset loaded from a CSV file. The visualization is built with React components that render SVG marks while leveraging D3’s `scaleBand` and `scaleLinear` to position rectangles along the x and y axes. Axis ticks and labels are generated manually by mapping over scale domains, and the chart includes a blue gridline for each tick value. The page is titled "CO2 emission in the Countries" and updates asynchronously when the data finishes loading.