The bar char illustrates the degree of air pollution caused by three factors in four countries, China, America, Japan and Australia, in 2021
Overall, it is clear that electricity generation had the least impact on air pollution in all given countries with the exception of Australia which its causes equally affected this phenomenon. Also, China had the far most polluted air among other countries.
Industry in China brought the highest level of air pollution which was 80 PPM. Although this factor was on top the air pollution of Japan, its figures was half as many as that for China. Plus, While transport in China and Japan ranked second among these factors, it was the most effective reason to make the air of America polluted with the level of roughly 60 PPM. However, this reason had a level of 80 PPM in China which is a higher figure than that for America, and the highest figures for America is equalent to the lowest one for China with the level of 60 caused by electricity generation.