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The chart 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.

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The bar chart illustrates the level of air pollution in four countries by specific causes in 2021. Units were counted as PPM.

Overall, it can be seen that the air pollution caused by electricity generation, transport and industry in China is higher than in any other countries while in Australia the numbers are the lowest one. Another striking feature is that in America transport has the same detrimental effect on the air as two other causes combined, and in Australia, these three causes account for the similar polluted air level.

To be specific, in China, air contamination has a fundamental effect on the environment when the industry account for 80 PPM, followed by the transport and electricity generation with 70 PPM and 60 PPM respectively. In America, the remarkable feature is that transport made up 60 PPM and has the same number in the air pollution level as electricity and industry combined together. Moreover, transportation affects badly when it is two times more stained than both generated electricity and industrialization.