The charts shows air pollution levels by different causes among four countries in 2021. Summaries the information by selecting and reporting the main features, and make comparisons where relevant.

The bar chart depicts the air qualities by different factors in four nations in 2021. Overall, air pollution was caused by electricity generation, industry and mainly transport. In addition, China air pollution by far was the most severe among America, Japan and Australia because all three categories reached a peak in China. Air pollution in […]