The bar charts illustrates air pollution levels by different causes in four countries ( China, America, Japan, and Australia ) in 2021.
Overall, it is evident that China is leading in air pollution levels all kinds of sources, while Australia had the lowest amount of air pollution. In contrast, America and Japan had moderate amount of air pollution levels.
In 2021, Australia had air pollution levels around 20 PPM in electricity generation, transport, and industry, making it the lowest levels of pollution compared to other countries. However, electricity generation pollution in Japan around 18 PPM, transport and industry pollution around 30 and above 40 throughout the period. America had highest pollution levels cause by transport around 55 PPM, while industry and electricity generation pollution remained constant around 30 PPM. Finally, China had the highest levels of air pollution through all sources like, industry pollution about 80 PPM, transport around 70 PPM, and electricity generation about 60 PPM, showed that industry causes highest amount of pollution.