Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A.The current concern is that it is rising day by day due to various resources of pollutants.
B.It has been there in different forms since a long time, even before human evolution, such as volcanic eruptions, wildfire which led to various photochemical reactions in the atmosphere.
C.Pollution has become a very common yet serious issue in today’s world.
D.And, one of the main pollutants are humans and man-made machines.