The given bar chart illustrates the air pollution levels by PPM about three main causes in four countries in 2021. The three main causes are electricity generation, transport and industry. The four countries are China, America, Japan and Australia.
Overall, we can see from the chart that China are most highest country of the air pollution. In contrast, Australia is the lowest country caused and well maintained of the air pulluiton.
The most highest pollution rate is industry in China, the PPM is 80. Transport is 70, electricity generation is near 60. The next country is America, the most significant rate is transport, the PPM is near 60. Whereas electricity generation and industry are around 30.
Japan is a litter bit better than America. Industry in Japan is highest, PPM is over 40. Then, Transport is 30 and electricity generation is less than 20. Australia maintained the best of the air pollution problems. All three causes are stay lower, under 20 of PPM. 
The  
given
 bar chart illustrates the  
air
  pollution
 levels by PPM about three main causes in four  
countries
 in 2021. The three main causes are  
electricity
 generation,  
transport
 and  
industry
.  
The
 four  
countries
 are China, America, Japan and Australia. 
Overall
, we can  
see
 from the chart that China are  
most highest
  country
 of the  
air
  pollution
.  
In contrast
, Australia is the lowest  
country
 caused and well maintained of the  
air
  pulluiton
.
The  
most highest
  pollution
 rate is  
industry
 in China, the PPM is 80.  
Transport
 is 70,  
electricity
 generation is near 60. The  
next
  country
 is America, the most significant rate is  
transport
, the PPM is near 60. Whereas  
electricity
 generation and  
industry
 are around 30.
Japan is a litter bit better than America.  
Industry
 in Japan is highest, PPM is over 40. Then,  
Transport
 is 30 and  
electricity
 generation is less than 20. Australia maintained the best of the  
air
  pollution
 problems. All three causes are stay lower, under 20 of PPM.