The charts shows air pollution levels by different causes among four countries in 2021

given bar graph illustrates the information about the air pollution produce by the three various sources in the four nations in the year 2021.

A quick is enough to make it clear that, almost least amount of pollution is produced from the electricity generation in four countries in the given time period.

A close look on the given data make it lucid that, the level of air pollution from industry is recorded 80 ppm in China. The air pollution level produce by the transport and electricity generation is accounted as 70 ppm and 59 respectively in China. Whereas, highest air pollution level is emitted from transportation in America and data is mentioned as just below 60 ppm. The air pollution level emit from electricity generation and industry is about to same and the level records to nearly 30 ppm.
Nonetheless, the air pollution level from electricity generation, vehicles and industry is almost same in Australia and the data is recorded just below 20 ppm. However, in Japan, 42 ppm and 30 ppm air pollution is produced from industry and transport respectively but only 15 ppm air pollution is caused from electricity generation.