The chart shows air pollution levels among four countries in 2012. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The bar graph illustrates information about the level of

air

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pollution in four different countries across

three

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sectors in 2012.

Overall

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, it is clear from the graph that China ranked first in all

three

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factors,

while

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the United States is primarily impacted by transportation as a significant cause of

air

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contamination, and Japan's main cause is factories or other industrial facilities, both of which ranked highest in two of the

three

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parts. Specifically, China's

air

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pollution levels are notably high, with all

three

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sectors exceeding 50PPM,

in contrast

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to the other

three

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countries. Industrial facilities,

such

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as factories and construction, account for a substantial majority of the contamination at 80PPM, followed by vehicles, including public transportation, at 70PPM, and electricity at 60PPM, which is more than double the amount of the second-ranked United States. In comparison, the United States is affected by electronic and industrial sources with an

air

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quality impact of around 30PPM,

while

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Japan shows similar impacts from transportation and significantly less from electronic consumption at 10PPM. In Australia, the data indicates it

as

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is

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an environmentally conscious country, with its

air

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pollution levels recorded at less than 20PPM in 2012.