acid rains are caused to the air pollution done by industries a lot. this acid rains contains many acids that are not good foe living and non living beings on this earth. this acid rain cause damage to the building and make them weak and the acid rain can even cause the humans get many skin diseases. this acid rains are causing much damage to the Taj mahal it is making the white marble turn in to yellow this is called as marble cancer here the marbles are turning yellow but it may be any other color also.
hope so my answer is useful..............^_^