The graph below gives information about air pollution leThe graph below gives information about air pollution levels in four parts of the world in 2011.vels in four parts of the world in 2011.

The diagram illustrates trend air pollution in aisa countris and in america. The graph show the majority PPM prodused by Industry in all countres and a minority of pollution genereates by electricity production in most of them apart of America, in same time transport evaperation placed in the midel by PPM points in most countris […]