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 air pollution levels by various reasons among China, America japan and Australia in the year 2021. Overall, we can see electricity generation, transport and industry are among top reasons behind air pollution in these four countries. All in all, China being on top while Australia at the bottom. As we can see, China is at the highest position in all three perspectives of polluting the air while japan is approximately half of America either contamination by electricity generation or transport. Moreover, japan is producing half of china when talking about industrial pollution while America's transport and industrial pollution level is approximately equal. Australia is least almost having all the concentrations equivalent that is approximately 20 parts per million. To conclude, I would say china is among highest in making the air contaminant by manufacturing 80 ppm of pollutants and industries being the top culprit. however, Australia is among least almost one third of china.